一、简单句中含有be动词、情态动词和助动词时，变否定句
时需在be动词、情态动词和助动词后加not。
1. （am, is ,are 是be动词）如：I am a teacher．→I am not
a teacher．This is a pen.→ This is not a pen.或This isn’t a pen. (is not =isn’t) You are a boy. →You are not a boy. (are not =aren’t)
2. （can是情态动词）He can help me．→He can not help me．或He can’t help me.(can not =can’t )
3.当主语是第一人称、第二人称和第三人称复数时用助动词do,变否定时，在do后面加not 如：I like English .I do not like English.或I don’t like English.
They go to school together. →They do not (don’t) go to school together.
4.当主语是第三人称单数时用does,变否定时，在does后面加not，如：The little girl wants to go there.→ The little girl does not (doesn't ) want to go there．
2．简单句中谓语动词为行为动词时，要根据时态选用do的相应形式，把肯定句变为否定句。如：
The little girl wants to go there．→The little girl doesn't want to go there．
He did his work yesterday．→He didn't do his work
yesterday．
3．祈使句变否定句时，一般在句首加Don't，但Let us或Let's 开头的祈使句在Let us或Let's后加not也可。如：
Put them over there．→Don't put them over there．
Let us go home．→Let us not go home．
或Don’t let us go home.
4．主从复合句中，主句是I think，I believe等结构，变否定句时，形式上否定主句，实际上否定从句。如：
I don't think chickens can swim ．我认为鸡不会游泳。5．“had better＋动词原形”，变否定句时为“had better not ＋动词原形”。如：
You'd better go to school．→ You'd better not go to school．6．动词不定式变否定式时，常在不定式to前加not。如：The teacher tells me to do it．→ The teacher tells me not to do it．
7．使役动词和感官动词（make，let，hear，see，watch等）后接省略to的不定式，此种不定式变否定句时只需在省略to 的动词原形前加not。如：
I saw her work．→I saw her not work．
8．特殊形式的否定句，有以下几种：
（1）肯定句含有every-的合成词时，变否定句时改为no-。如：
Everything is ready．→Nothing is ready．
（2）肯定句中含有always，usually和ever时，变否定句时改为never。如：
He is always late for school．→He is never late for school．（3）肯定句含有many，much时，变否定句时分别改为few，little。如：
Many students know him．→Few students know him．
（4）肯定句中含有still时，变否定句时应改为no longer。如：Tom is still in bed．→Tom is no longer in bed．
（5）肯定句含有both，both．．．and，all时，变否定句时应改为never，neither．．．nor，none。如：
Both of us are students．→Neither of us is a student．
（6）肯定句含有nearly，almost时，变否定句时应改为hardly。如：
Lily nearly knows him ．→Lily hardly knows him ．
（7）肯定句含有“形容词＋enough”时，变为否定句时应改为“too ＋形容词的反义词”。如：
He is short enough to reachit．He is too tall to reach it．（1）谓语动词是be，have（有）或谓语含有助动词、情态动词时，直接在这些词后加上否定词not。如：
She can swim．She can't swim．
（2）谓语动词是行为动词时，要在该动词前加上do ／does
／did not，该词恢复原形。如：
He gets up early．He doesn't get up early．
（3）既要否定谓语动词，又要变换句中的单词。如：
He can read and write．He can't read or write．
（4）用含否定意义的词或词组取代肯定句中的某些词或词组。如：
I know both English and Chi- nese．I know neither English nor Chinese．
类似的有：ever ／always never，somebody nobody，something nothing，everybody no one，almost hardly 2．祈使句的肯定式变否定式
（1）一般在动词前加上don't。如：
Open the window ．Don't open the window．
（2）含有“L et's．．．”的祈使句，一般用“Let'snot．．．”的形式，美国人偶尔也用“Don'tlet's．．．”这一形式。加强语气时使用“Let'sdon't．．．”这一形式。如：
Let's go there．Let's not go there．
3．复合句的肯定式变否定式
一般将主句变为否定式。如：I saw her when I left ．I didn't see her when I left．
肯定句改为否定句的基本方法
把肯定的陈述句改为否定句的基本方法首先要掌握否定句构成的基本规则。
①当陈述句的谓语动词由be构成时，改为否定句，把not 加在be后面。
例1．They are doctors．
这个句子的谓语动词是由系动词构成的，改为否定句时把not加在are的后面，即：They are not doctors．
例2．He is g oing to see his friend tomorrow．
本句的谓语由is going to see构成，改为否定句时把否定词not 加在is后面，即：He is not going to see his friend tomorrow．②当陈述句的谓语由情态动词can（may，must等）＋其他动词构成，或由助动词will，have，had等十其他动词构成时，改为否定句，用情态动词或助动词十not＋动词的形式表示。例3．They will go to see their parents this afternoon．
这个句子谓语由助动词will加动词g o构成，改为否定句时，把not放在will后面，即：They will not（won't）go to see their parents this afternoon．
例4．The train had already left when we got to the station．
这个句子谓语由助动词had加leave的过去分词left构成，改为否定句时要把not加在had后面，同时already改为yet，即：The train had not left yet when we got to the station．
例5．Linda can speak Chinese well．
本句的谓语由can＋speak构成，把它改为否定句时，在can 后面加not，即：Linda can not speak Chinese well．
例6．We have already learned English for two years．
本句的谓语由have＋learned构成，把它改为否定句时，要在助动词have后面加not，把句中的already改为yet，即：We have not learned English for two years yet．
③当陈述句的谓语动词是have，表示有什么，改为否定句的方法是：（A）由have＋not＋其他；（B）由have十no十其他；（C）由don't（doesn't，didn't）＋have十其他，如果句中有some，要将some改为any。
例7．You have some books．
这个句子谓语动词have当“有”讲，在改为否定句时要把not放在have后，并把some改为any，即：You have not any books．这个句子也可以改写为在have后加no即：You have no books．这个句子还可以改写为：You don't have any books．④当陈述句的谓语由have十其他词构成，这时have不当“有”讲，也不是“助动词”，改为否定句时，由助动词do（does，did）＋not＋have构成否定结构。
例8．They often have breakfast at seven in the morning．
本句的谓语动词是have，而have＋breakfast的意思是“吃早饭”，把它改为否定句，要由助动词do＋not＋have breakfast 构成否定形式，即：They don't have breakfast at seven in the
morning．
例9．He had a meeting yesterday afternoon．
本句谓语动词had＋meeting的意思是“开会”，是一般过去时，改为否定句时由did not＋have a meeting构成否定形式，即：He didn't have a meeting yesterday afternoon．
●以上两个例句说明改成否定句时，千万不要盲目把否定词加在have（has，had）后面。如果是由has或had ＋其他词构成的谓语改为否定句时，加上（does，did）not后要注意把has，had改为原形have。
⑤陈述句的谓语动词是行为动词，改为否定句时，要用助动词do（does，did）＋not＋行为动词构成否定形式。
例10．He studies English well．
本句的谓语由行为动词studies构成，把它改为否定句时要由助动词does＋not构成否定形式，即：He doesn't study English well．
例11．Her brother went to London in 1998．
本句的谓语由行为动词g o的过去式went构成，改为否定句时，由助动词did＋not构成否定形式，即：Her brother didn't go to London in 1998．
例12．Betty often does her homework after supper．
这个句子的谓语由行为动词does构成，要把它改为否定句，须用助动词does＋not并把其放在主语之后，同时把原句中的
does改为原形即：Betty doesn't often do her homework after supper．
例13．He did it by himself．
本句的谓语由did构成，把它改为否定句要由助动词did ＋not构成否定式，并放在主语后面，同时要把原句中的did改为do，即：He didn't do it by himself．
●要注意加上does not或did not改为否定句以后，要把原句的动词改为原形动词，特别是行为动词do的第三人称单数does和过去时did，在主语后面加上doesn't或didn't以后，千万要注意把句中的does或did改为do。
⑥祈使句的否定结构为：don't十原形动词。
例14．Look out of the window．
改为否定句时，要在句首加上don't，其它不变，即：Don't look out of the window．
⑦当陈述句中含有something这个词时，把句子改为否定句有两种方法：其一，在句中相应位置加not，再把something 改成anything；其二，直接把som ething改为nothing即可。例14．There is something wrong with the radio．
把这个句子改为否定句有两种方法：其一，先把not加在is 后面，再把something改为anything即：There is not anything wrong with the radio．其二把som ething直接改为nothing，即：There is nothing wrong with the radio．
例15．I have something important to tell you．
把这个句子变成否定句有两种方法：其中一种方法是先把not 加在have后面，再把something变成anything，即：Ihave not anything important to tell you．第二种方法是直接把something 改为nothing，即：Ihave nothing important to tell you．
⑧当陈述句是一个主从复合句，而主句的谓语动词是think 或believe等时，把这种句子改为否定句，往往是否定think 或believe
等而不否定后面从句中的谓语动词，尽管意思是否定从句的谓语动词。
例16．I think he will be back soon．
这个复合句中主句的谓语动词是think，所以在改为否定句时要在think前面加上don't，即：I don't think he will be back soon．汉语意思：我认为他不会很快回来。但不能说：I think he won't be back soon．
⑨某些特殊句型改为否定句时，有不同的方法：
1）在陈述句中含有had better时，要把not加在better后面，动词原形前面。
例17．You had better go with us．
把这个句子改为否定句，要把not加在better之后，g o之前，即：You had better not go with us．千万不要改成：You had not better to go with us．或You had better don't go withus．因为，
要否定的是后面的动词不定式短语。同时，had better后面要用动词原形（不带to）。
2）当陈述句中含有both＋名词或者bothof＋名词作主语时，改为否定句时则用nei- ther代替both，并且要注意谓语动词数的变化。
例18．Both of them work in the school library．
句子含有both，改为否定句时用neither代替both，同时谓语动词work改为works，即：Neither of them works in the school library．
例19．Both answers are right．
把这个句子改为否定句，用neither代替both，谓语动词are 改为is，即：Neither answer is right．
3）句中含有both．．．and的肯定句改为否定句时用neither ．．．nor改写，同时neither．．．nor还可以把两个简单句的否定形式连成一个句子。
例20．Both Mary and Joan are students．
把这个句子改为否定句时，通常用Neither．．．nor代替Both．．．and，同时把are改为is，students改为a student即：Neither Mary nor Joan is a student．
●neithe r．．．nor连接两个主语时，谓语动词决定于nor后面的名词或代词的单复数形式。
例21．This book is both interesting and instructive．
把这个句子改为否定句，用neither．．．nor代替both．．．and，因为连接部分在句中作表语，所以谓语动词不变，
即：This book is neither interesting nor instructive．
例22．I don't see that film．He doesn't see it either．
这两个否定句可以用neither．．．nor连成一个句子，谓语动词改为肯定式see，人称和数由nor后面的he决定，即：Neither he nor I see that film ．，或者把I和he交换．即：Neither I nor he sees that film．这说明谓语的人称和数由nor后面的靠近谓语的人称和数决定。在把肯定句改为否定句时，注意把句中的 some，already，something等词改为any，yet，anything。有一些表示否定意义的副词，如never，seldom ，hardly ，little ，few等也可以使句子成为否定句。例如：
He has few good friends here．
There is little water in the bottle．
I hardly believe it．
巩固练习：将下列句子改为否定句
1．We do morning exercises every day．
We _______ _______ morning exercises every day．
2．All of us can swim．
_______ _______ _______ can swim．
3．Both Joan and I are in Class One．
_______ Joan _______ I _______ in Class One．
4．There is som ething wrong with my bike．
There _______ _______ wrong with my bike．
5．You may stay here before I come back．
You _______ _______ here before I come back．6．Read the text after me．
_______ _______ the text after me．
7．Li Lei needs som e help with his English．
Li Lei _______ _______ _______ help with his English．8．He said he would g o to Beijing the next week．
He _______ _______ _______ _______ go to Beijing the next week．
9．The bike has already been m ended．
The bike _______ _______ mended _______ ．10．Ithink it is going to rain tomorrow．
I _______ _______ _______ _______ going to rain tomorrow．
Key:
1．don't do 2．None of us 3．Neither；nor；am 4．is nothing 5．mustn't stay 6．Don't read 7．doesn't need any 8．didn't say he would 9．hasn't been；yet 10．don't think it is
谓语动词是与非谓语动词相对应的概念．两者都是动词，但是前者是作谓语成分，后者不能作谓语成分．而谓语
成分就是用来说明主语的动作或状态的，一般由动词或短语动词承担．
比如：我看电视．”看”就是谓语．
你正在上网．”上网”也是谓语．
再举几个英语句子吧：I see a girl.我看见一个女孩．”看见””see"就是这个句子的谓语．而see也是个动词，所以就叫做谓语动词．She is very beautiful.她很漂亮．"is"就是这个句子的谓语，也是动词．
而短语动词就是动词加小品构成的起动词作用的短语叫短语动词。例如：
Turn off the radio. 把收音机关上。（turn off是短语动词）
短语动词的构成基本有下列几种：
1）动词+副词，如：black out；
2）动词+介词，如：look into；
3）动词+副词+介词，如：look forward to。构成短语动词的副词和介词都统称为小品词。以后你会学到非谓语动词，顾名思义，非谓语动词也是动词，但不能作谓语，只能作主语、表语、宾语、补语、状语、定语。非谓语动词又分为动名词、不定式和分词。
中考句型转换错误分析肯定句变否定句 1. I think she is there. 误：I think she isn’t there. 正：I don’t think she is there. 析：英语中think, believe, expect, suppose等表示信念和揣测的动词，后接that从句时，习惯上将从句中的否定形式转移到主句上，即否定主句谓语，不否定从句谓语。 2. He can sing this song and that one. 误：He cannot sing this song and that one. 正；He cannot sing this song or that one. 析：肯定句中的连词and在否定句中一般要改为or。 3. Tom went to school too. 误：Tom didn’t go to school too. 正：Tom didn’t go to school either. 析：too和also用于肯定句中时，否定句中用either替换。 4. He has had supper already. 误：He hasn’t had supper already. 正：He hasn’t had supper yet. 析：随着对谓语动词的否定，某些副词也要作相应的变动。 5. He had a good rest just now. 误：He hadn’t a good rest just now. 正：He didn’t have a good rest just now. 析：have在表示开会、吃饭、休息、进行体育锻炼等词组中是行为动词，否定句用助动词来完成。 6. Let’s do it.
英语肯定句改为否定句、陈述句改为一般疑问句的方法和诀窍㈠肯定句变为否定句的方法——⑴加；⑵变 ⑴“加”——是指加not。加not的规则是：原句中有“情助be”时则直接在“情 助be”后加not（not可与“情助be”缩写）；原句中没有“情助be”时则需要另加助动词do/does/did, 然后在助动词do/does/did后加not（not可与助动词do/does/did缩写）。 助动词do和does用于一般现在时，did用于一般过去时。 ⑵“变”——是指变化某些需要变化的词（因为某些词只能用于肯定句或只能用 用于否定句）。如：some→any（someone→anyone，something→anything，somewhere→anywhere）；and→or；too/also→either[′aie?; ′i: e?]；a lot of→many/much等。另外，使用助动词does/did帮助否定时，原来的谓语动词要恢复原形。 例：1）He can swim. →He can’t swim. 2）He will（将，要）swim. →He won’t(will not) swim. 3）He is a good swimmer. →He isn’t a good swimmer. 4）I have some English books. →I don’t have any English books. 5）She can sing and dance. →She can’t sing or dance. 6）Li Lei’s father has a lot of money. →Li Lei’s father doesn’t have much money. 7）He went to Shanghai last week. →He didn’t go to Shanghai last week. 说明：大多数英语肯定句改为否定句都符合上述规则，但也有一些特殊的情况不符合上述规则，在以后的学习中会学到，要注意积累。如： 例：1）He saw（看见）someone in the room. →He didn’t see anyone in the room. 也可改为：→He saw no one in the room. 2）He always（总是，一直）plays computer games. →He never（从来不）plays computer games. 3）Everyone here likes him. →No one here likes him. ㈡陈述句变为一般疑问句的方法——⑴提；⑵变 ⑴“提”——是指把“情助be”提到主语之前，即句首。提前“情助be”的规则 是：原句中有“情助be”时则直接提前“情助be”；原句中没有“情助be”时则需要另加助动词do/does/did放于句首，助动词do和does用于一般现在时，did用于一般过去时。 ⑵“变”——是指：①变化某些需要变化的词。如：some→any（someone→anyone， something→anything，somewhere→anywhere）。但是，不像肯定句变为否定句那样，陈述句变为一般疑问句时and、too/also、a lot of等不必改变。陈述句变为一般疑问句时，习惯上第一人称改为第二人称（见下面例4））。另外，使用助动词does/did帮助提问时，原来的谓语动词要恢复原形。②变句首字母大小写。陈述句变为一般疑问句时，要注意句首字母大小写的改变。③变标点。陈述句变为一般疑问句时句号要改为问号。 例：1）He can swim. →Can he swim? 2）He will（将，要）swim. →Will he swim? 3）He is a good swimmer. →Is he a good swimmer? 4）I have some English books. →Do you have any English books?
专题: 把肯定句改成否定句 把肯定句改成否定句分以下情况： 1、句中有be动词的，在be动词后加not； 2、句中有情态动词的（can ,should，must ，would），在情态动词后面加not； 3、句中没有be动词和情态动词的，在动词前加d on’t或doesn’t ； ①句中动词为原形的，加d on’t.如： I like apples. →I do n’t like apples. ②句中动词为三单式的，加does n’t，并将三单式的动词还原成原形。 如：He likes apples.→ He does n’t like apples. ③时态为过去时的,要加didn’t 而且动词过去式要改为原形, 例:I went to school yesterday .→I didn’t go to school yeaterday . 4.肯定句中的some在否定句中应改为any 如：There are some students in the classroom.→ There are not any students in the classroom. 将下列各句改成否定句 1、Tom’s brother is walking in the park. ______________________________________________________ 3、The students of Class 5 are cleaning the classroom. ______________________________________________________ 5、Tom and Mary are friends. ______________________________________________________ 7、There are some books in the bookcase. ______________________________________________________ 9、I’m a student. ______________________________________________________ 11、Your father can ride a bike. ______________________________________________________ 13、They can play football after school. ______________________________________________________ 16、We come from China. ______________________________________________________ 19、He likes the violin. ______________________________________________________ 20、Have some bread, Tom. ______________________________________________________
肯定句变否定句的基本方法 一、如果谓语中有情态动词、助动词或be，直接在它们后面加not构成否定句。 1.在含系动词be、助动词be, have, has, will, would, shall, should等之后直接加not，构成否定句。如： He is there. — He is not there. 他不在那儿。 I have finished my work. — I have not finished my work. 我的工作还没完成。 She will agree with you. — She will not agree with you. 她不会同意你的意见。 He will not go there. 他不会那里。 I am not a teacher. 我不是教师。 2.否定含情态动词的句子： a.在情态动词can, could, may, might, must, need, dare, had better, would rather的句子之后直接加not。如： (1) He can say so. — He can not say so. 它不会那样说。 (2) Students must smoke. — Students must not smoke. 学生不允许抽烟。 (3)You’d better go there now.—You’d better not go there now. 现在你最好不要去那里。 (4)I’d rather tell you the truth.—I’d rather not tell you the truth. 我倒想不告诉你真相。 (5) He dared ask his parents for money again. — He dared not ask his parents for money again. 他不敢向父母亲要钱。 I can not dance. 我不会跳舞。 b.在含情态动词ought to的句子，在ought to中的to前面加not，构成否定句。如： (1) You ought to bother him. — You ought not to bother him. 你不应该去麻烦他。 (2) You ought to waste your time. — You ought not to waste your time. 你不应该把时间浪费了。 c.在含情态动词used to的句子，可在used to中的to前面加not；也可在used前面加did not，同时将used 改为use。如： (1) He used to smoke in the past . — He used not to smoke in the past. 他过去不常抽烟。 (2) He used to live here. — He did not use to live here. 他原来常不住这里。 d.在含情态动词have / has / had to的句子，在have / has / had to前面加do not的适当形式, 同时将has / had 改为have。如： (1) You do have to stay here after school. — You do not have to stay here after school. 你不必放学后还呆在这里。 (2) He had to go to work yesterday. — He did not have to go to work yesterday. 他昨天不必去上班。 二、如果谓语中没有情态动词、助动词或be，在动词之前加do not (一般现在时第三人称单数用does not,过去时用 did not，并将原来的谓语动词改为原形) 。 (1) He likes classic music. — He does not like classic music. 他不喜欢古典音乐。 (2) She played table tennis yesterday afternoon. — She did not play table tennis yesterday afternoon. 她昨天下午没有打乒乓球。 You don’t look well today.你今天气色不好。 She does not know what to do. 她不知道做什么。
肯定句改否定句的发： 1．看句子中有没有系动词或情态动词，如果有，就直接在系动词或情态动词后加not。例如：They were busy yesterday.(他们昨天很忙)，句子中有系动词were，改为否定句时就直接在系动词were 后加not，改为They were not busy yesterday.（他们昨天不忙）。再例如You should stand here(你应该站在这儿)，改为否定句，在情态动词should后加not，改为You should not stand here.(你不应该站在这儿) 2.句子中如果没有系动词或情态动词，就在实意动词前（主语后）don′t或doesn′t 或didn′t（根据实意动词的形态确定），实意动词必须变回原形。 例如：The children feel happy.(孩子们感到快乐)，动词是原形形式的feel,所以在动词前加don′t，改为否定句：The children don′t feel happy.（孩子们感到不快乐） 再例如：She takes up the phone(她拿起电话)，动词是单三形式的takes,所以在动词前加doesn′t，同时必须把句子中的takes变回原形take，改为否定句：She doesn′t take up the phone(她没拿起电话) 再例如：He told me a story(他给我讲了一个故事)，动词是过去式形式的told,所以在动词前加didn′t，同时必须把句子中的told变回原形tell，改为否定句：He didn′t tell me a story(他没有给我故事)
肯定句、否定句、一般疑问句和特殊疑问句的讲解与练习 二．句子的种类 二、肯定句、否定句、一般疑问句和特殊疑问句定义 1．肯定句：表示肯定的意思, 即不含有否定词“不”。 比如：我是一个学生 I am a student. 他去上学 He goes to school. 2．否定句：表示否定的意思。 比如：我不是一个男孩。 I am not a boy. 他不去上学 He does not go to school. 3. 一般疑问句：回答为“是yes”或者“否no”的问句。 比如：你是一个学生吗？ Are you a student? 你喜欢英语吗？ Do you like English? 4. 特殊疑问句：回答不是“是yes”或者“否no”的问句，根据提问内容具体回答。 比如：现在几点了？ What’s the time? 哪一支笔是你的？ Which is your pen? 三、肯定句、否定句、一般疑问句和特殊疑问句的相互转换 肯定句变否定句：在am, is, are 后面加上not,其余按顺序照抄。 肯定句变一般疑问句：把am, is, are 提前放到句首并大写Am, Is, Are,其余照抄。 肯定句变特殊疑问句（就划线部分提问）：分3步骤 第一步：先变一般疑问句。 第二步：找合适的特殊疑问词代替划线部分。
第三步：特殊疑问词提前放到句首，并大写，其余按顺序照抄，省略划线部分。 注意：1. 如：Liming 's not here today. Who's not here today? 今天谁没来？ 2.划线部分不能在特殊疑问句中出现。 1．肯定句、否定句和一般疑问句的互换 肯定句： 否定句： 一般疑问句： 肯定回答：Yes, it is. 否定回答：No, it isn’t. 2．就划线部分提问(变特殊疑问句) This is a book. 第一步：变一般疑问句 Is this a book? 第二步：找合适的特殊疑问词 Is this what ? What is this? do not或者does not,其余按顺序照抄动词用原形。 do或者does并大写,其余照抄。注意：动词用原形。 肯定句变特殊疑问句（就划线部分提问）：分3步骤。 第一步：先变一般疑问句。 第二步：找合适的特殊疑问词代替划线部分。 注意：1. 2.划线部分不能在特殊疑问句中出现。 非单三时用do, 单三时用does。 非单三 否定句： 单三 English. English? 否定句：like English. I like English.
一、简单句中含有be动词、情态动词和助动词时，变否定句 时需在be动词、情态动词和助动词后加not。 1. （am, is ,are 是be动词）如：I am a teacher．→I am not a teacher．This is a pen.→ This is not a pen.或This isn’t a pen. (is not =isn’t) You are a boy. →You are not a boy. (are not =aren’t) 2. （can是情态动词）He can help me．→He can not help me．或He can’t help me.(can not =can’t ) 3.当主语是第一人称、第二人称和第三人称复数时用助动词do,变否定时，在do后面加not 如：I like English .I do not like English.或I don’t like English. They go to school together. →They do not (don’t) go to school together. 4.当主语是第三人称单数时用does,变否定时，在does后面加not，如：The little girl wants to go there.→ The little girl does not (doesn't ) want to go there． 2．简单句中谓语动词为行为动词时，要根据时态选用do的相应形式，把肯定句变为否定句。如： The little girl wants to go there．→The little girl doesn't want to go there． He did his work yesterday．→He didn't do his work
小学英语肯定句、否定句、一般疑问句和特殊疑问句 一、be动词：am, is, are 二、肯定句、否定句、一般疑问句和特殊疑问句定义 1．肯定句：表示肯定的意思, 即不含有否定词“不”。 比如：我是一个学生 I am a student. 他去上学 He goes to school. 2．否定句：表示否定的意思。 比如：我不是一个男孩。 I am not a boy 他不去上学 He does not go to school. 3. 一般疑问句：回答为“是yes”或者“否no”的问句。 比如：你是一个学生吗？ Are you a student? 你喜欢英语吗？ Do you like English? 4. 特殊疑问句：回答不是“是yes”或者“否no”的问句，根据提问内容具体回答。比如：现在几点了？ What’s the time? 哪一支笔是你的？ Which is your pen? 三、肯定句、否定句、一般疑问句和特殊疑问句的相互转换 有am, is, are的句子， 肯定句变否定句：在am, is, are后面加上not,其余按顺序照抄。 肯定句变一般疑问句：把am, is, are提前放到句首并大写Am, Is, Are,其余照抄。 肯定句变特殊疑问句（就划线部分提问）：分3步骤 第一步：先变一般疑问句 第二步：找合适的特殊疑问词代替划线部分 第三步：特殊疑问词提前放到句首，并大写，其余按顺序照抄，省略划线部分。 注意：1.一定先变一般疑问句。但是，如果问的是主语或主语的定语时，语序不变，为"特殊疑问词(+主语)+陈述句"。 如：Li ming 's not here today.Who's not here today? 今天谁没来？ 2.
英语中含be动词的肯定句、否定句的详解 重点单词 me[mi:]我him[h?m]他her[h?(r)]她us[?s]我们them[e?m]他/她/它们no[n?u]不note[n?ut]笔记student[?stju:dnt]学生teacher['ti:t??(r)]老师friend[frend]朋友一、人称代词 be动词的一般现在时形式：am, is, are 人称代词：表示“我”、“你”、“他”、“她”、“它”、“我们”、“你们”、“他们”的词。人称代词有 口诀：人称代词分两格，主格宾格来分说； 主格定把主语作，宾格作宾不会错。 人称代词与be动词搭配 二、肯定句、否定句的定义 ` 陈述句：用于说明一件事，表示一种看法或表达某种心情的句子，都是陈述句。陈述句的句末必须使用句号“.” 以示句子的陈述结束。 陈述句分为肯定句和否定句。 1. 肯定句：对事物作出肯定判断的句子。表示肯定意义的句子。 比如：我是一个学生I am a student. 2．否定句：对事物作出否定判断的句子。表示否定的意思。 比如：我不是一个男孩。I am not a student. 三、含be动词的肯定句变为否定句：在be后面直接加not，其余的按顺序照抄。 I am a boy. →I am n ot a boy. 注意简写形式：
48个国际音标之元音 1、[?:]舌身平放, 舌中部稍微抬起, 成自然状态,口半开半闭 、 her [[h??]girl [g?:l] 2、[?]口半开半闭，牙床较张开，舌身平放，舌中部稍微抬起，成自然状态 teacher ['ti?t??] mother ['m?e?] 3、[?]发音时舌端和舌尖两侧轻触下齿，舌后部靠前部分轻抬起；唇形稍扁，开口度较大，与[?]相似。bus [b?s] cut [k?t] sun[s?n]太阳duck[d?k]鸭子 4、[a:]发音时口张大，舌身压低并后缩，后舌稍隆起，舌尖不抵下齿，双唇稍收圆。 class[klɑ:s]班级car[kɑ?]小车father['fɑ?e?]父亲 练习： 一、用be动词适当的词填空。 1. I ________ from China. 2. She _______ a student. 》 3. I_________ beautiful. 4. You ______ from America. 5. It_____ a dog. 7. She ___ a teacher. 8. I ___ a girl. 9. He ___ a handsome boy. 10. They ___ my parents. 二、单词填空。 1. Nice to __________ (遇见，见到) you. 2. ---What’s______（这）---It’s a _______ (狗). 3. _______ (看) at me. 4. ______(她的) name is Mary. ! 5. ______(什么) is your phone number is a _____ (男孩). _____ (有)a ruler. 8. _____(哪里) are your from 三、句型转换 1. Her phone number is 929-31. (就划线部分提问) _________ _______ her phone number 2. I’m Jenny. (改为同义句) ____________ ____________ is Jenny. 3. His name is Tom.(就划线部分提问) _______ ________his name 4. John is fine.( 就划线部分提问) _______ ________ John 5. I’m from China. (就划线部分提问) _______ ________ ________ from 6. They are friends. (变为否定句) _______ ________ friends. 7. How do you do (作出相应的回答) _______ ________ ________ ________ 8. How are you (作出相应的回答) _______ ________ ________, ________. 9. It’s a pencil. (就划线部分提问) _________ this
1、You can use this dictionary.（改为否定句） You cannot（can’t）use this dictionary. 2、There is some wonderful news in today’s paper.（改为否定句） There areany wonderful news in today’s paper. 3、They play football on the playground.（改为一般疑问句，并作肯定回答） Do they play football on the playground? Yes, they do. 4、This is my ID card.（改为一般疑问句） Is this your ID card？ 5、The schoolbag is under the desk.（改为一般疑问句，并作肯定回答） Is the schoolbag under the desk? Yes,it is. 一、肯定句改否定句的方法： 1、在be动词后加not。如：is not ， are not ，am not， was not， were not； 2、在can，should， will等后加not。如：cannot，should not， will not；
3、上述都没有的，在动词前加助动词否定形式don’t/doesn’t/didn’t。 4、 some 改成any。 如： I am a girl. → I am not a girl. You are a student. →You are not a student. →You aren’t a student. This is Tom’s bag, → This is not Tom’s bag. → This isn’t Tom’s bag. 答题方法是；否定词not在be后边。 二、肯定句改一般疑问句的方法： 1、把be动词放在句首，剩下的照抄，（some 改成any，I改成you，my改成your，）句点改成问号。 2、把can，shall， will等放到句首，剩下的照抄，（some 改成any，I改成you，my改成your，）句点改成问号。 3、上述都没有的，在句首请助动词Do/Does/Did帮忙，剩下的照抄，（some 改成any，I改成you，my 改成your，）句点改成问号。 注意：句首的第一个字母要大写，句尾标点应为“？”。如： I am in Class 6. →Are you in Class 6?
肯定句和否定句专项练习 一、肯定句 1、含有be动词的肯定句将be动词（is、am、are 如果是过去时态，则is、am过去式was，are过去式为were）放在主语后构成含有be 动词的肯定句，其中如果是Are you 构成一般疑问句则改为I am。 1、Are you a boy? (改肯定句) I am a boy. 2.Is she going to the post office? (改肯定句) She is going to the post office. 3.Are they watching TV now? (改肯定句) They are watching TV now. 4.Were you a student? (改肯定句) I was a student. 2、含有动词的肯定句一般由Do/Does/Did引导一般疑问句改为肯定句，如果由Do引起疑问句，则肯定句中动词用原形，如果用Does 引起疑问句，则肯定句中动词加s或者es, 如用Did引起疑问句，则肯定句中动词用过去式（一般动词过去式在动词后加ed ,不规则过去式除外） 1、Do you go to school on foot? (改肯定句) I go to school on foot. 2、Does she go swimming in the afternoon? (改肯定句) She goes swimming in the afternoon. 3、Does your father like playing football? (改肯定句) My father likes
playing football. 4.Did you go fishing yesterday? (改肯定句) I went fishing yesterday. 5.Did Tom clean his room last weekend? (改肯定句) Tom cleaned his room last weekend. 3.含有can、should、must、would等情态动词的肯定句将句子中can、should、must、would等情态动词放在主语后面，其中主语you 改为 I. 1、Can you fly kites? (改肯定句) I can fly kites. 2、Should you do your homework now? (改肯定句) I should do my homework now. 肯定句练习 1、Is it a fine day today? (改为肯定句) 2、Is he thin and short? (改为肯定句) 3、Is there a river in the park? (改为肯定句) 4、Are you drawing pictures now? (改为肯定句） 5，Is he writing an E-Mail in the room? (改为肯定句) 6、Is there a cinema near here? (改为肯定句) 7、Do you have English on Tuesday? (改为肯定句) 8、Were you 12? (改为肯定句) 9、Was she a beautiful girl? (改为肯定句) 10、Do you do your homework? (改为肯定句) 11、Does she have a computer? (改为肯定句)
肯定句变否定句的基本方法 一、动词be 的否定式 动词be根据不同的人称和时态可以有am, is, are, was, were等不同形式，可用作连系动词(表示“是”、“在”等)和助动词(用于构成进行时态和被动语态等)，但不管何种情况，构成否定式时，一律在其后加not I’m old, but you’re young. 我老了，但你还年轻。 →I’m not old, but you’re not young. 我还不老，但你不年轻了。 He was reading and I was writing. 他在读，我在写。 →He was not reading and I was not writing. 他没有在读，我没有在写。 二、动词have 的否定式 动词have根据不同的人称和时态可以有have, has, had等形式，可以用作实意动词和助动词，分以下情况讨论 1. 用作实意动词表示状态，如表示拥有、患病或用于have to表示“必须”等，在构成否定式时可以直接在其后加not，也可根据情况在其前使用don’t, doesn’t, didn’t He has a car. 他有辆小汽车。 →He hasn’t a car. / He doesn’t have a car. 他没有小汽车。 He had some dictionaries. 他有一些词典。 →He hadn’t any dictionaries. / He didn’t have any dictionaries. 他没有词典。 You have to go with him. 你必须同他一起去。 →You haven’t to go with him. / You don’t have to go w ith him. 你不必同他一起去。【注】have to构成否定式时以在其前加don’t等较为常见。
一、肯定句改否定句的方法： 1、在be动词后加not。如：is not ， are not ，am not， was not， were not； 2、在can，should， will等后加not。如：cannot，should not， will not； 3、上述都没有的，在动词前加助动词否定形式don’t/doesn’t/didn’t。 4、 some 改成any。 如： I am a girl. → I am not a girl. You are a student. →You are not a student. →You aren’t a student. This is Tom’s bag, → This is not Tom’s bag. → This isn’t Tom’s bag. 答题方法是；否定词not在be后边。 二、肯定句改一般疑问句的方法： 1、把be动词放在句首，剩下的照抄，（some 改成any，I改成you，my改成your，）句点改成问号。 2、把can，shall， will等放到句首，剩下的照抄，（some 改成any，I改成you，my改成your，）句点改成问号。 3、上述都没有的，在句首请助动词Do/Does/Did帮
忙，剩下的照抄，（some 改成any，I改成you，my 改成your，）句点改成问号。 注意：句首的第一个字母要大写，句尾标点应为“？”。如： I am in Class 6. →Are you in Class 6? You are from America. →Are you from America? It is an orange. →Is it an orange? 答题方法是：要想提问，be提前，句末“？”别忘了。 4、就一般疑问句回答 一般疑问句有两种回答，即：肯定回答和否定回答。其中，肯定回答用yes,否定回答用no。语句顺序为：Yes + 主语+ am /is/ are/was/were.|can.|do/does/did|; No + 主语+ am not/ isn’t/ aren’t/wasn't/weren't.|can't.|don't/doesn't/didn't |.。如： —Are you an English teacher?→Yes, I am. /No, I am not. —Is that a bird? →Yes, it is./ No, it isn’t. 三、对划线部分提问 “就划线部分提问”是小学阶段英语学习的
英语语法之肯定句变否定句一、肯定句变否定句口诀 给句子分析它，看它结构是哪个 主加be后加not 其他一切全照抄 主加动词主重要 don't doesn't 来帮忙 don't doesn't 中间夹 doesn't doesn't 最特殊第三人称单数全靠它 二、简单句的句子结构 1.主语+be+其他 2.主语+动词+其他 备注：其中be里包括（am is are） 判断下列各句是主语加be还是主语加动词 1.I am a girl. 2.I like singing. 3.We go to school every day. 4.They are good friends. 5.He works hard. 6.She likes playing with toys. 7.My mother watches TV every day. 8.You are a beautiful girl. 9.Tom is playing football on the playground.
10.Bill does his homework after supper. 三、肯定句变否定句规则 肯定句 主语+be+其他变成主语+be+not+其他 主语+动词+其他变成主语+don't+动词+其他 主语（第三人称单数）+动词单三+其他变成 主语（第三人称单数）+doesn't +动词原形+其他 练习 1.She is watching TV now. 2.We go to school on Sunday. 3.His father works hard. 4.Jack's mother is a nurse. 5.The cat runs fast. 6.They like reading books. 7.My grandpa gives me a hot dog. 8.Tom often walks to school. 9.I have a doll. 10.It is eating fish. 肯定句变否定句的基本方法 发布人：圣才学习网发布日期：2010-06-24 13:39 共人浏览[大] [中] [小] 【导读】一．动词be的否定式动词be根据不同的人称和时态可以有am， is， are， was， were 等不同形式，可用作连系动词（表示是、在等）和助动词（用于构成进行时态和被动语态等），但不管何种情况，构成否定式时，一律在其后加not： I’m old， but you’re young． 一．动词be的否定式
一、简单句中含有be动词、情态动词和助动词时，变否定 句时需在be动词、情态动词和助动词后加not。 1. （am, is ,are 是be动词）如：I am a teacher．→I am not a teacher．This is a pen.→ This is not a pen.或This isn’t a pen. (is not =isn’t) You are a boy. →You are not a boy. (are not =aren’t) 2. （can是情态动词）He can help me．→He can not help me．或He can’t help me.(can not =can’t ) 3.当主语是第一人称、第二人称和第三人称复数时用助动词do,变否定时，在do后面加not 如：I like English .I do not like English.或I don’t like English. They go to school together. →They do not (don’t) go to school together. 4.当主语是第三人称单数时用does,变否定时，在does后面加not，如：The little girl wants to go there.→ The little girl does not (doesn't ) want to go there． 2．简单句中谓语动词为行为动词时，要根据时态选用do的相应形式，把肯定句变为否定句。如： The little girl wants to go there．→The littl e girl doesn't want to go there． He did his work yesterday．→He didn't do his work
~ 句型转换的方法（一） 一、肯定句改否定句的方法——一步法 1、在be动词后加not。如：is not ， are not ， am not， was not， were not； 例如：He is in the classroom. (改为否定句） He is not ( isn’t ) in the classroom. 2、在can，should， will等后加not。如：can not， should not， will not；例如： Mike can sing English songs. ( 改为否定句） Mike can not ( can’t ) sing English songs. 3、] 4、上述都没有的，在动词前加助动词否定形式don’t/doesn’t/didn’t。 例如： I like pizza. ( 改为否定句） I don’t like pizza. 5、句中有some 的要改成any。 例如： There are some books on the desk. ( 改为否定句） There are not ( aren’t ) any books on the desk. 二．实战演习: 把下列各句改为否定句 1.John is walking in the park. ~ __________________________________ 2.Tom and Marry are friends. ___________________________________ 3.I’m a student. ___________________________________ 4.She will go to Beijing tomorrow, ___________________________________ 5.We get there by bike. ） ___________________________________ 6.He likes apples. ___________________________________ 7.There are some flowers in the picture. __________________________________ 8.I often play football with my friend. __________________________________ 9.We are from China. < __________________________________ 10.They can go to school by ferry. _________________________________