助动词do与does的用法
be动词与助动词的用法 1.陈述句:be动词第一人称用am,第二人称用are,第三人称单数用is复数用are. 助动词do一般省略,直接用动词,注意动词时态和人称变化.有时在动词前加do,表示强调,加强语气.如:Do be quiet! 2.疑问句:be动词直接提前,其他部分不变(由陈述句转变).助动词do同样,由省略直接提前放置,后面动词不变,注意do的时态和人称变化. 3.否定句:be动词和助动词do后面加not. be作助动词用的形式如下： ①am, is, are, was, were ②助动词+be：shall be, will be, can be, etc. ③have/has/had + been（完成时） ④am, is, …being（进行时） （1）表达进行时态 句型be + V-ing…（进行时态） 例：What are you reading? （你正在阅读什么？） I am reading a magazine. （我正在阅读杂志。） 例：He will be taking a walk in the park at this time tomorrow morning. （明天早晨此时他将会正在公园散步。） 例：She has been teaching English in our school for years. （她已在我们学校教英语许多年了。） 解说第一例句是表达现在进行时，第二例句是将来进行时，第三例句是现在完成进行时。（2）表达被动语态 句型be +p.p. …（被动语态） 例：English is spoken in both Canada and the United States. （加拿大和美国都讲英语。）
助动词do/does的用法专题 助动词do与does口诀 （一）(do ) 变句型，先观察，陈述句中动用原, 一般疑问do提前，否定don’t实动前。 （二）(does) 若是主语为三单，陈述句中动变形，一般疑问也简单， does放在句子前，否定doesn’t实动前，主动出现动还原。 总结： 含有实义动词的句子，进行句子转换时应借助于助动词do/does，主语是三单(he,she,it)时用does，其他用do。否定句在动词原形前加don’t /doesn’t，一般疑问句把do/does 提前,特殊疑问句由特殊疑问词+一般疑问句。 句子类型及结构 肯定句：主语+动词+其它。主语是三单，动词用三单 I like this blue sweater. Tom likes this blue sweater. 我喜欢这件蓝色的毛衣。Tom喜欢这件蓝色的毛衣。 Tom likes English. Tom喜欢英语。 I like this blue sweater. Tom likes English. 否定句：主+ don’t/doesn’t+动原+其它 I don’t like this blue sweater. 我不喜欢这件蓝色的毛衣。 Tom doesn’t like English. Tom不喜欢英语。 I like this blue sweater. Tom likes English. 一般疑问句：do/does提前，其它照抄不变（Do /Does+主+动原+其它），一人称变二人称。回答：Yes,主+do/does. No,主+ don’t/doesn’t. Do you like this blue sweaterYes, I do. / No, I don’t. 你喜欢这件蓝色的毛衣吗是的，我喜欢; 不，我不喜欢。 Does Tom like EnglishYes,he does. / doesn’t. Tom喜欢英语吗是的，他喜欢；不，他不喜欢。
小学英语语法：助动词do 的用法 1) 构成一般疑问句，例如： Do you want to pass the CET? 你想通过大学英语测试吗? Did you study German? 你们学过德语吗? 2) do + not 构成否定句，例如： I do not want to be criticized. 我不想挨批评。 He doesn't like to study. 他不想学习。 In the past, many students did not know the importance of English. 过去，好多学生不知道英语的重要性。 3) 构成否定祈使句，例如： Don't go there. 不要去那里。 Don't be so absent-minded. 不要这么心不在焉。 说明：构成否定祈使句只用do，不用did和does。 4) 放在动词原形前，增强该动词的语气，例如： Do come to my birthday party. 一定来参加我的生日宴会。 I did go there. 我确实去那儿了。 I do miss you. 我确实想你。 5) 用于倒装句，例如： Never did I hear of such a thing. 我从未听说过这样的事情。
Only when we begin our college life do we realize the importance of English. 只有在开始大学生活时我们才理解到英语的重要性。 说明：引导此类倒装句的副词有never, seldom, rarely, little, only, so, well等。 6) 用作代动词，例如： ---- Do you like Beijing? --你喜欢北京吗? ---- Yes, I do. --是的，喜欢。(do用作代动词，代替like Beijing.) He knows how to drive a car, doesn't he? 他知道如何开车，对吧? 助动词do 的用法是我们精心为大家准备的，希望大家能够多加练习，为以后学好英语打下坚实的基础!
be动词，情态动词，助动词do/does的用法区别及练习 1.由连系am，is，are构成的句子：变一般疑问句时把am，is，are提到句子的前面，句尾用问号即可。变否定句时直接在am，is，are后面加not即可。例如： 肯定句:He is a student. 一般疑问句: Is he a student? 否定句: He is not a student. 画线提问:对he提问: Who is a student? 对a student提问: What is he? or What does he do? 2.由情态动词can, may, should等构成的句子:变一般疑问句时把can,may,提到句子的前面,句尾用问号即可.变否定句时直接在can,may,后面加not即可.例如: 肯定句: She can swim. 一般疑问句: Can she swim? 否定句: She can not swim. 画线提问:对she提问: Who can swim? 对swim提问: What can she do? 3.由行为动词构成的句子:需要加助词do或does.变一般疑问句时把do/does放在句子前面.变否定句时把don’t/doesn’t放在动词的前面。要注意观察动词的形式并对号入座。一般疑问句和否定句的动词三单式都要变回原型。 play-----do plays-----does 例如: 肯定句: They play football after school. He plays football after school. 一般疑问句: Do they play football after school? Does he play football after school? 否定句: They don't (do not) play football after school.He doesn’t’play football after school. 画线提问:对they/he提问: Who plays football after school? 对play football提问: What do they do after school?What does he do after school?对after school提问: When do they play football?When does he play football? 针对性练习 按要求改写句子： 1.I know the answer.(一般疑问句) ______ ______ __________the answer? 2.We can see some birds.(一般疑问句) ______ ______ see ______ birds? 3.He designs clothes.(一般疑问句) ______ he ________ clothes? 4.There are some flowers on the teachers’ desk.(一般疑问句) ______ ______ ______ flowers on the teachers’ desk? 5.There are some apples on the tree.(否定句)
助动词do的用法 1）构成一般疑问句，例如： Do you want to pass the CET? 你想通过大学英语测试吗？ Did you study German? 你们学过德语吗？ 2） do + not 构成否定句，例如： I do not want to be criticized. 我不想挨批评。 He doesn't like to study. 他不想学习。 In the past, many students did not know the importance of English. 过去，好多学生不知道英语的重要性。 3) 构成否定祈使句，例如： Don't go there. 不要去那里。 Don't be so absent-minded. 不要这么心不在焉。 说明：构成否定祈使句只用do，不用did和does。 4）放在动词原形前，加强该动词的语气，例如： Do come to my birthday party. 一定来参加我的生日宴会。 I did go there. 我确实去那儿了。 I do miss you. 我确实想你。 5）用于倒装句，例如： Never did I hear of such a thing. 我从未听说过这样的事情。 Only when we begin our college life do we realize the importance of English. 只有在开始大学生活时我们才认识到英语的重要性。 说明：引导此类倒装句的副词有never, seldom, rarely, little, only, so, well等。 6）用作代动词，例如： ---- Do you like Beijing? --你喜欢北京吗？ ---- Yes, I do. --是的，喜欢。（do用作代动词，代替like Beijing.） He knows how to drive a car, doesn't he? 他知道如何开车，对吧？ 助动词be的用法 1） be +现在分词，构成进行时态，例如： They are having a meeting. 他们正在开会。 English is becoming more and more important. 英语现在越来越重要。 2) be + 过去分词，构成被动语态，例如： The window was broken by Tom.. 窗户是汤姆打碎的。 English is taught throughout the world. 世界各地都教英语。
人教版七年级上册英语语法知识——助动词do和be动词的用法及区别(无答案） 助动词do与be动词的用法及区别 【知识精讲】 I．复习BE动词 1、be动词的用法。 be am / is are 现在时 was were 过去时 单数复数 英语中，be动词选用单数还是复数，要由主语来定，主语是单数，就用单数， 反之用复数。 ◆句中含有be动词时： 肯定句：主语＋be ＋其他 否定句：主语＋be ＋not ＋其他 一般疑问句：Be ＋主语＋其他＋？ 特殊疑问句：疑问词（what / who / when / where）＋be ＋主语＋其他＋？ I am a teacher. You are right. She is 16 years old. My father is at home. The students are playing games. My teacher was ill yesterday. There is a picture on the wall. There are two books on the table. ★ be动词用法歌： 我用am，你用are，is 连接他她它。单数名词用is，复数名词全用are。 变疑问，往前提，句末问号莫丢弃；变否定，更容易，be后not莫忘记； 疑问否定任你变，句首大写莫迟疑。 ★ be动词作谓语，它后面一般跟名词、形容词或介词短语。 II 助动词的用法。 1.助动词：帮助一个句子构成否定句、疑问句，不充当任何成分和任何意义。 2.初一年级的助动词一般是do/does. 3.英语句子按正常语序是“什么人或事物” + “做什么”，即，我们常说的“主语+
归纳起来, do ,does 的用法有四方面: 一.用作一般的动词,均可.do是一不规则变化的动词(do ,did,done). do,据人称和单复数的不同而有字形的变化.第一第二人称,以及第一.二.三 人称的复数时,都用do . 第三人称单数时,用does( he does she does it does ) 例如: I do my homework on Sunday. You do your homework on Sunday. We do our homework on Sunday. You do your homework on Sunday. They do their homeworkon Sunday. He does his homework on Sunday. She does her homework on Sunday. 二.当助动词用,用它来构成疑问句.这时它本身没有实义,只是一个构成疑问句的符号而已.这种用法时,它随人称和数的变化规则与上述相同.只是把它放到句子的最前面(句首).例如: Do I ............... Do you ............. Do we .............. Do you ............. Do they ............ Does he ............ Does she ........... Does it ............ 三.当助动词用,与not 连用使句子构成否定句.其随人称和数的变化规则与上述相同.例如:
I do not .................. (do not 可简化为don't ,下同) You do not ................ We do not.................. You do not................. They do not................ He does not................ (does 可简化为doesn't,下同) She does not............... 四.当作助动词,本身在句子中无实义,只是加强句子中动词的语气.其随人称和数的变化同上.例如: Do write to me.(一定写信给我!) Never do I see such a fool.(我从来没见过这样的蠢才.) She does come.(她的确来了.) * * * * * * 按词性, do 还可以用作名词.其意是"欺骗";"宴会,宴请".例如: It's all a do.(完全是欺骗.) We have got a do on to-night.(家里今晚请客.)
be动词、一般动词和助动词 一、be动词、一般动词的现在式 （1）be动词的现在式—am/are/is a.是（表状态） We are happy.—我们很高兴 b.在（表存在） She is in America.—她在美国 含be动词（am/are/is）的肯定句变成否定句时，在be动词后加not即可。 肯定句：主语+am/are/is… 否定句：主语+am/are/is+not… He is a good baseball player. 他是一个好棒球员 （否定句）He is not a good baseball player. = He’s not a good baseball player. = He isn’t a good baseball player. 含be动词（am/are/is）的肯定句变成疑问句时，将be动词拿到主语前，句尾加？即可。肯定句：主语+am/are/is… 疑问句：Am/Are/Is+主语…？ 1.That is his camera. 那是他的相机 （疑问句）Is that his camera?
2.The girl is a junior high school student. 那女孩是初中生 （疑问句）Is the girl a junior high school student? 动词开头的疑问句为一般疑问句，可用yes或no回答，而答句中的主语 （问句）Am/Are/Is+主语…？ （答句）Yes,主语+am/are/is No,主语+am/are/is not 1.Is that man your math teacher? Yes, he is./No,he is not. 2.Are you eating your lunch? Yes, I am./No, I’m not. （2）一般动词的现在式 凡是日常生活中具体的动作，如：eat-吃饭，walk-走路及抽象的动作如：like-喜欢，think-思考…皆为一般动词 a.大部分动词加s works/plays b.一般动词词尾为o/s/sh/ch时。加es go-goes/wash-washes/watch-watches c.一般动词词尾为字音+y时，去y加ies cry-cries/study-studies have和has has为have（有，吃）的单数形式 They have a lot of money.
助动词do 的用法 1）构成一般疑问句，例如： Do you want to pass the CET? 你想通过大学英语测试吗？ Did you study German? 你们学过德语吗？ 2）do + not 构成否定句，例如： I do not want to be criticized. 我不想挨批评。 He doesn't like to study. 他不想学习。 In the past, many students did not know the importance of English. 过去，好多学生不知道英语的重要性。 3)构成否定祈使句，例如： Don't go there. 不要去那里。 Don't be so absent-minded. 不要这么心不在焉。 说明：构成否定祈使句只用do，不用did和does。 4）放在动词原形前，加强该动词的语气，例如： Do come to my birthday party. 一定来参加我的生日宴会。 I did go there. 我确实去那儿了。 I do miss you. 我确实想你。 5）用于倒装句，例如： Never did I hear of such a thing. 我从未听说过这样的事情。 Only when we begin our college life do we realize the importance of English. 只有在开始大学生活时我们才认识到英语的重要性。 说明：引导此类倒装句的副词有never, seldom, rarely, little, only, so, well等。 6）用作代动词，例如： ---- Do you like Beijing? --你喜欢北京吗？ ---- Yes, I do. --是的，喜欢。（do用作代动词，代替like Beijing.） He knows how to drive a car, doesn't he? 他知道如何开车，对吧？ do 这个词（does是第三人称单数形式），大体上从两方面来讲。 1.作为行为动词，跟其他动词一样，如study, play等。他的意思是“做”等。如： We usually do our homework in the afternoon. He does his homework in the evening. 2.作为助动词，也就是帮助主要动词构成否定和疑问等。 We don't like bananas. Do you like apples? Does he like English? He doesn't like swimming 上面有一句He does his homework in the evening.要是变成否定句就成了这个样子： He doesn't do his homework in the evening. 这里加上了助动词doesn't，而原来的主动词does变成原形do了。 作为助动词的do和does是没有词义的，它们在句中的构成一般现在时的疑问句和否定句. Do用于主语第一人称，第二人称和第三人称复数形式的句中，does用于主语第三人称单数的句中。
1. 由连系 am , is , are 构成的句子:变一般疑问句时把 am , is , are 提到句子的前面, 句尾用问号即可。变否定句时直接在 am , is , are 后面加 not 即可。例如: 肯定句 :He is a student. 一般疑问句 : Is he a student? 否定句 : He is not a student. 反问句 : He is a student, isn't he? He isn't a student, is he? 画线提问 : 对 he 提问 : Who is a student? 对 a student 提问 : What is he? or What does he do? 2. 由情态动词 can, may, should等构成的句子 : 变一般疑问句时把 can,may, 提到句子的前面 , 句尾用问号即可 . 变否定句时直接在 can,may, 后面加 not 即可 . 例如 : 肯定句 : She can swim. 一般疑问句 : Can she swim? 否定句 : She can not swim. 反问句 : She can swim, can't she? She can not swim, can she? 画线提问 : 对 she 提问 : Who can swim? 对 swim 提问 : What can she do?
3. 由行为动词构成的句子 : 需要加助词 do 或 does. 变一般疑问句时把 do/does 放在句子前面 . 例如 : 肯定句 : They play football after school. 一般疑问句 : Do they play football after school? 否定句 : They don't (do not play football after school. 反问句 : They play football after school, don't they? They don't play football after school, do they? 画线提问 : 对 they 提问 : Who play football after school? 对 play football提问 : What do they do after school? 对 after school提问 : When do they play football? 1. 由连系 am , is , are 构成的句子:变一般疑问句时把 am , is , are 提到句子的前面, 句尾用问号即可。变否定句时直接在 am , is , are 后面加 not 即可。例如: 肯定句 :He is a student. 一般疑问句 : Is he a student? 否定句 : He is not a student. 反问句 : He is a student, isn't he? He isn't a student, is he? 画线提问 : 对 he 提问 : Who is a student? 对 a student 提问 : What is he? or What does he do?
助动词do \ does \ did 和be动词am \ is \ are 用法的区别 助动词do \ does \ did do是原形，用于一般现在时态中的第一二人称和第三人称的复数（I,you,we,they）； does是do的第三人称单数形式，用于一般现在时态的第三人称单数（he,she,it，姓名）；did是do的过去式，用于一般过去时态的任何人称（I,you,he,she,it,we,they）。 不管怎样，跟在这三个词后面的动词都必须为动词原形。 do \ does \ did+ V.（动词原形） 例如： Do you like meat\ bananas\fish\apples? No,I don`t. Does he like apples? No,he doesn`t. He does like apples. like就是原形 Where did he go yesterday? 他昨天哪儿了？ Did you study English? 你们学过英语吗？ 系动词（be动词）am \ is \ are be是系动词,又称be动词,包括am、is、are三个。 am用于第一人称单数；(I) 第三人称单数用is；(he\she\it) 其他人称全部都用are。(we \they\ you\ 、、、) was （am \ is 的过去式） wasn’t were（are 的过去式） weren’t 练习题： ______she like drinking? ________they play football? ______she beautiful? ________your dog walk in the zoo? ______she come from China? He ________ like pears. ______she from China? _______ your cats eat fish? ______ he watch TV at night? _______ you go to school everyday? ______ we have a good teacher? I ________ have a watch. ______you a student? , .（否定回答） There ______ many boats on the lake. Children ______ happy yesterday. Amy ______ hungry yesterday. ______ they young then? ______ he tall then? , .（否定回答） ______ it sunny? , .（否定回答） ______ it windy yesterday ______ Beijing? , .（否定回答）______ she ______ ______ zoo then? , .（否定回答）
苏打水1. 由连系am，is，are构成的句子：变一般疑问句时把am，is，are提到句子的前面，句尾用问号即可。变否定句时直接在am，is，are后面加not即可。例如： 肯定句:He is a student. 一般疑问句: Is he a student? 否定句: He is not a student. 反问句: He is a student, isn't he? He isn't a student, is he? 画线提问: 对he提问: Who is a student? 对a student 提问: What is he? or What does he do? 2. 由情态动词can, may, should等构成的句子: 变一般疑问句时把can,may,提到句子的前面,句尾用问号即可.变否定句时直接在can,may,后面加not即可. 例如: 肯定句: She can swim. 一般疑问句: Can she swim? 否定句: She can not swim. 反问句: She can swim, can't she? She can not swim, can she? 画线提问: 对she提问: Who can swim? 对swim提问: What can she do? 3. 由行为动词构成的句子: 需要加助词do或does. 变一般疑问句时把do/does放在句子前面. 例如: 肯定句: They play football after school. 一般疑问句: Do they play football after school? 否定句: They don't (do not) play football after school. 反问句: They play football after school, don't they? They don't play football after school, do they? 画线提问: 对they提问: Who play football after school?
1、be动词的用法。 be am / is are 现在时 was were 过去时 单数复数 英语中，be动词选用单数还是复数，要由主语来定，主语是单数，就用单数，反之用复数。 ◆句中含有be动词时： 肯定句：主语＋be ＋其他 否定句：主语＋ be ＋ not ＋其他 一般疑问句： Be ＋主语＋其他＋？ 特殊疑问句：疑问词（what / who / when / where）＋ be ＋主语＋其他＋？ I am a teacher. You are right. She is 16 years old. My father is at home. The students are playing games. My teacher was ill yesterday. There is a picture on the wall. There are two books on the table. ★ be动词用法歌： 我用am，你用are，is 连接他她它。单数名词用is，复数名词全用are。 变疑问，往前提，句末问号莫丢弃；变否定，更容易，be后not莫忘记； 疑问否定任你变，句首大写莫迟疑。 ★ be动词作谓语，它后面一般跟名词、形容词或介词短语。 2、助动词的用法。 英语句子按正常语序是“什么人或事物” + “做什么”，即，我们常说的“主语 + 谓语 + 其他”。 ①主语为I 或复数名词、代词时： 肯定句： I / We / They / The students ＋动词原形＋其他＋。 We watch TV every night. 变否定：主语＋don’t ＋动词原形＋其他＋。 We don’t watch TV every night. 一般疑问句 Do + 主语 + 动词原形 + 其他 + ？ Do you watch TV every night? Yes, we do. / No, we don’t. 特殊疑问句：疑问词 + do + 主语 + 动词原形 + 其他 + ？ How often do you watch TV? ②主语为单数名词或代词时： 肯定句：主语 + 动词第三人称单数形式 + 其他 + 。 He watches TV every night. 否定句：主语+ doesn’t+动词原形+其他+。
英语中be动词用法和助动词---do 1. 由连系am，is，are构成的句子：变一般疑问句时把am，is，are提到句子的前面，句尾用问号即可。变否定句时直接在am，is，are后面加not即可。例如： 肯定句:He is a student. 一般疑问句: Is he a student? 否定句: He is not a student. 反问句: He is a student, isn't he? He isn't a student, is he? 画线提问: 对he提问: Who is a student? 对a student 提问: What is he? or What does he do? 2. 由情态动词can, may, should等构成的句子: 变一般疑问句时把can,may,提到句子的前面,句尾用问号即可.变否定句时直接在can,may,后面加not即可. 例如: 肯定句: She can swim. 一般疑问句: Can she swim? 否定句: She can not swim. 反问句: She can swim, can't she? She can not swim, can she? 画线提问: 对she提问: Who can swim? 对swim提问: What can she do? 3. 由行为动词构成的句子: 需要加助词do或does. 变一般疑问句时把do/does放在句子前面. 例如: 肯定句: They play football after school. 一般疑问句: Do they play football after school? 否定句: They don't (do not) play football after school. 反问句: They play football after school, don't they?
Do 和 Does 的用法 作为助动词的 do 和 does 是没有词义的，它们在句中的构成一般现在 时的疑问句和否定句。 三单用 does, 复数用 do ●询问动物是否喜欢什么句型： Do snakes like music? 【复数 , 用 do 提问，they 答】 肯定回答：Yes, they do. 否定回答：No, they don’t. Does snake like music? 【单数，用 does 提问， it 答】 肯定回答：Yes, it do. 否定回答：No, it don’t. ●询问别人是否经常干某事句型：Do you often ? 你经常干什么吗？ 回答： Yes, I do/ No, I don’t. 例： Do you often play games? 你经常玩游戏吗？ Yes,I do/ No, I don’t. ●询问别人是否想要干某事句型：Do you want to +动词原形?你想干什么吗？肯定回答： Yes, I(we) do/ Yes, please. 否定回答：No, I (we) don’t/ No, thank you
例： Do Yes, No, you I want I(we) (we) to drink a coffee? do/ Yes, please. don’t/No,thank 你想喝一杯咖啡吗？ you 练习题： 1.What__you need for breakfast? Some milk and an egg. 2.I__want any juice.I want some milk. 3.Do Ben and you like vegetables? No,we___. 4.How__they go to school?By underground. 5.__your friend have lessons every day?No,he__. 6.What__your father do? He's a shop assistant. 7.Tom,__make a noise in class,please. 8.Kitty__do her homework at school.She___it at home. 三将下列句子改为否定句和一般疑问句 1.I do my homework at home. 否定句： 一般疑问句： 2.We have a picnic on Sundays. 否定句： 一般疑问句： 3.Ben rides his bicycle at four o'clock.
助动词的用法 一、助动词do的用法 在英语中，助动词本身没有意义，只是帮助实义动词完成某些语法功能，如构成否定句、疑问句、简略答语等。 do 有两种形式 原形 现在时第三人称单数 do的基本用法： 构成否定句 构成一般疑问句及回答 构成特殊疑问句 1.原形 肯定式：do 否定式：do not 缩略否定式: don’t 用法：do用在第一人称单复数(I,we…)、第二人称单复数(you…)和第三人称复数(they…)做主语，且时态为一般现在时的句子中，构成否定句、一般疑问句及回答、特殊疑问句。 Examples： I like this red hat. 我喜欢这顶红色的帽子。 否定句：我不喜欢这顶红色的帽子。 I don’t like this red hat.
一般疑问句及回答:你喜欢这顶红色的帽子吗？ 是的，我喜欢。∕不，我不喜欢。 Do you like this red hat? Yes, I do./ No, I don’t. 特殊疑问句: 你喜欢哪一顶帽子？Which hat do you like? Lily and I want to go to Beijing. 莉莉和我想去北京。 否定句：Lily and I don't want to go to Beijing. 莉莉和我不想去北京。 一般疑问句及回答： Do Lily and you want to go to Beijing? Yes, we do. ∕No, we don't. 莉莉和你想去北京吗？ 是的，我们想去。∕不，我们不想去。 特殊疑问句：Where do Lily and you want to go? 莉莉和你想去哪儿？ 练习：１、我不喜欢狗。 Ｉdon't like dogs. ２、你喜欢什么颜色？ What color do you like? ３、你有词典吗？是的，我有。 Do you have a dictionary?
Step 5 Do / Does 用法 do 这个词（does是第三人称单数形式），大体上从两方面来讲。 1.作为行为动词，跟其他动词一样，如study, play等。他的意思是“做”等。如：We usually do our homework in the afternoon. He does his homework in the evening. 2.作为助动词，也就是帮助主要动词构成否定和疑问等。 We don't like bananas. Do you like apples? Does he like English? He doesn't like swimming. 上面有一句He does his homework in the evening.要是变成否定句就成了这个样子： He doesn't do his homework in the evening. 这里加上了助动词doesn't，而原来的主动词does变成原形do了。 作为助动词的do和does是没有词义的，它们在句中的构成一般现在时的疑问句和否定句. Do用于主语第一人称，第二人称和第三人称复数形式的句中，does用于主语第三人称单数的句中。 Eg. Do you want to be a teacher? 你想成为一个老师吗？ Do his friends go to park every day? 他的朋友们每天都去公园吗？ I don’t like him. 我不喜欢他。 Where does Tom come from? 汤姆来自哪里？ I don’t know.我不知道。 He doesn’t live here. 他不住在这儿。 由助动词do/does引导的一般疑问句 1、将一个肯定句变为疑问句时，应将do/does放在主语的前面，实义动词用原形。 例句：I/ We / You want some yogurt. →Do you want any yoghurt ? William wants some beer.→Does William want any beer?
Be动词与助动词 1.英语句子里完整句子结构为：_______________________________ 2.主语是______________。谓语是_________________________。 3.英语句子里完整句子中只能有_____个谓语动词。 4.Be动词的2种基本用法： （1） ____________________________________________________ （2）_____________________________________________________ 5.有Be动词的否定句怎么做？______________________________。 6.有Be动词的疑问句怎么做？______________________________。 7.什么叫实义动词？_______________________________________ 8.有实义动词的否定句怎么做？_____________________________ 9.有实义动词的疑问句怎么做？_____________________________ 10.Be动词和实义动词可以同时出现吗？______________________ 为什么？_______________________________________________ 1.（1）学生对隐形了的“be动词”容易出现语法上的错误。(即“句 中有形容词与介词短语，又没有谓语动词时) 例：我很漂亮。----I beautiful. 这本书在桌子上。----This book on the desk. （2）学生对“this\that”意思的转变不够灵活。 例：这个/这只…… （3）形容词性物主代词与人称代词。 我爸爸是一名教师。---father is a teacher.