动词第三人称单数形式的练习动词的变化规则
1．一般情况下，直接加-s
2．以s. x. sh. ch. o结尾，加-es
3．以“辅音字母+y”结尾，变y为i, 再加-es
一、写出下列动词的第三人称单数
drink ________ go _______ stay ________ make ________ look _________ have_______ push_______ carry _______ come________ watch______ read_______ fly ________
study_______ brush________ do_________ teach_______ drive _______ work _______ help______ take ______
like _______ draw _______ write ______ find _______
二.用括号内动词的适当形式填空。
1.He often ________(have) dinner at home.
2.We ____________(not watch) TV on Monday.
3.Mike ____________(not go) to the zoo on Sunday.
4.______ (do) they ________(like) reading stories?
5.What _______(do) they often _______(do) on Saturdays?
6._______(do) your parents _______(read) newspapers every day?
7.The girl _______(teach) us English on Sundays.
8.She and I ________(take) a walk together every evening.
9.There ________(be) some water in the bottle.
10.Mike _______(like) cooking.
11.They _______(have) the same hobby.
12.My aunt _______(look) after her baby carefully.
13.He can_______(do) his homework well.
14.My father is a factory worker. He ______(make) toy cars.
15.She _______(go) to school from Monday to Friday.
16.Liu Tao _______(do) not like PE.
17.The boy often _______(watch) TV in the evening.
18.Su Hai and Su Yang _______(have) eight lessons this term.
19.I like ____________ (swim).
20.He _________(read) English every day.
21.We _________(go)to school at seven in the morning.
22.Mike________(go)to school at seven in the morning.
23.My mother________(like) ______(go) shopping.
24.I can ________(draw) many beautiful pictures.
25.She_________(make) a model plane.
26.Do you ________(like)_________(run)?
27.Does he_________(like)_________(jump) ?
28.Does Nancy_________(have) an English lesson on Saturday ?
29.The teachers________(like)___________(dance).
30.The teacher________(like)____________(dance).
31.The students___________(speak) English in class.
32.The student_________(speak) Chinese after class.
33. Let’s____________and play football . ( go )
34. He_________( not ) like swimming .
35.Nancy __________ (not have) an animal friend.
36. What ______(do) your sister ______(do)? She _____(be) a doctor.
37. What ______ (does) your parents _____(do)? They ____ (be) teachers.
38. _____ (do) the policemen do well in skating? No, they _______(not).
39. What _____ (do) this girl _____(do)? She ____ (be) a writer. She ______(write) many stories.
40. Can LiuTao ______ (play) table tennis well?
三、按照要求改写句子
1. Sam watches TV every evening.(改为否定句)
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2. I do my homework every day.(改为一般疑问句，作否定回答)
________________________________________________________
____________________________
3. She likes milk.(改为一般疑问句，作肯定回答)
_______________________________________________________
____________________________
4. Amy likes playing computer games.(改为一般疑问句，作否定回答)
________________________________________________________
____________________________________
5. We go to school every morning.(改为否定句)
_______________________________________________________
6. He speaks English very well.(改为否定句)
___________________________________________________
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一、选择题 1．It is 11:00 p.m now. Peter hasn't come back yet. His mother ______ be very mad at him. A．may B．can C．must D．need 2．—Have you heard about the temperature of the earth will rise to 59℃ in 2020?—Don’t worry! The news _______ be true. A．must not B．may not C．needn’t D．will not 3．-Listen! A wolf is crying! -It _______ be a wolf, because a wolf never comes out at this time. A．mustn’t B．needn’t C．can’t D．don’t 4．I’ve bought a nice necklace for Jo’s birthday. She _____like it, but I’m not sure. A．can B．may be C．might D．must 5．---Mum, must I finish my homework today? ---No, you . Tomorrow is Sunday and you may have a rest today. A．shouldn’t B．mustn’t C．can’t D．don’t have to 6．You look quite tired. You'd better ________ a good rest. A．stop to have B．stop having C．to stop to have D．to stop having 7．—Tom, we’re going shopping at eight, right? —Yeah, but I ______ be a little late, so don’t wait for me. A．may B．should C．mustn’t 8．You should________ the teacher________being late for school. A．apology to, about B．apologize to, for C．apologies to, for D．apologize to, on 9．—Can you come to my party on Saturday afternoon? —Sorry, I can’t. I ________ meet my friends. A．can’t B．might have to C．needn’t 10．— I wonder if these are Jim's glasses. —They _____his. He doesn't wear glasses. A．might be B．could be C．can't be 11．—The book report is very important. You ________ write it carefully. —But I ________ hand it in now. A．must; must B．have to; must C．must; have to D．have to; have to 12．Even the top student can't work out this problem, so it________ be too difficult. A．must B．may C．can D．need 13．—________ I borrow the books from the library, Miss Yang? —Sorry, you________. These books are only for members of the English Club. A．Can; couldn’t B．Could; can’t C．Could; could n’t D．Can; needn’t
一、选择题 1．—______ you please tell me something about the life in Canada or America? —Sorry, I______. I don’t know either. I’m from Australia. A．Could; couldn’t B．Can; couldn’t C．Could; can’t D．Can; mustn’t 2．Since you are very tired, you ______ finish the work today. A．needn’t B．may not C．mustn’t D．can’t 3．—Is Wendy in the classroom now? —I’m not sure. She ________ be there. I saw her in the library ten minutes ago. A．may not B．must not C．shall not D．would not 4．The designer has tried every possible way to make the robot light, so you _____ worry about its weight. A．must B．may C．can’t D．needn’t 5．All passengers_____ go through safety check before they take a plane. A．may B．can C．must D．need 6．A: Is Jim coming by train? B: I’m not sure. He _______ drive his car. A．must B．may C．need D．should 7．—Jenny, you _________ push your way onto the bus. —I’m really sorry about it. A．mustn’t B．needn’t C．may not 8．From March 23rd, 2013, anyone under the age of 14 ________ go into Disneyland alone. A．couldn’t B．mustn’t C．needn’t D．mightn’t 9．—Can I take some milk and biscuits to the reading room? —No, our school has a rule that students _______ eat or drink there. A．can’t B．mustn’t C．needn’t D．may not 10．— I wonder if these are Jim's glasses. —They _____his. He doesn't wear glasses. A．might be B．could be C．can't be 11．—How nice the building is! What is it for? —It ________ a hotel. But I’m not sure. A．must be B．have to be C．may be D．can be 12．—________ David be the new chairperson of the Students’ Union? —He _______ be, but I’m not sure. A．Can; can’t B．Can; may C．May; must D．May; mustn’t 13．—Sorry, Ms Wang. I left my homework at home. Must I hand it in today? —No, you_______ . You_______ bring it here tomorrow. A．mustn’t; should B．needn’t; must C．mustn’t; may D．needn’t; c an 14．The milk tastes bad. You’d better_______.
一般现在时精讲什么是一般现在时：一、：表示经常性的事情，经常性的动作或一般性事实。一般现在时动词（单数或者复数根据主语决定）+结构： 主语什么时候用一般现在时：二、当句子表示客观真理，客观存在，科学事实时：1. The earth moves around the sun. Shanghai lies in the east of China. 当句子是名言警句时：2. 骄者必败。Pride goes before a fall. 当句子表示现在时刻的状态、能力、性格、个性：3. I don't want so much. Ann Wang writes good English but does not speak well. 4. 当句子中出现了时间标志语：once a year等（1）表示频度的副词或词组always ,often, usually, sometimes， 等时间状语，at …在几点钟every day, in the morning, every year（2）三一般现在时怎么用：、2当句子符合上面任何一种情况，则句子采用一般现在时，这时候动词要开始改变啦，兵分路改变：大部队一路：当主语是第三人称单数时：、动词变成相应的第三人称单数形式（动词的复数形式）1、肯定句：主语其它+动词复数+2代表动词的复数，不代表没有任何does+其它（其中的+doesn't+3、否定句：主语动词原形意义）其它？+Does+4、一般疑问句：主语+动词原形+does、肯定回答：Yes，主语5+doesn't，主语No、否定回答：6．does) 一般疑问句？（一般疑问句中用+7、特殊疑问句：特殊疑问词 小分队一路：当主语不是第三人称单数时：、动词不变成相应的第三人称单数形式（动词不用变成复数）1其它动词原形+、肯定句：主语2+代表动词的单数，不代表没有任何意义）do、3否定句：主语+don't+动词原形+其它（其中的+其它？主语4、一般疑问句：Do++动词原形，主语+do、肯定回答：5Yes，主语+don'tNo6、否定回答：一般疑问句？（一般疑问句中用+do)7、特殊疑问句：特殊疑问词
必修三unit2语法讲解情态动词用法（二） 、ought to的用法 1. ought to应该”与should相比较ought to语气重,偏重责任、义务、 道德、法律”等方面，意为应该” ①We ought to stop polluti ng n ature.我们应该停止污染大自然。 2. ought to表示较大的可能性。 ①Mary ought to be here soon.玛丽应该很快就来了。 ［点津］用ought to表示推断时，语气较肯定，通常指的是一种合乎逻辑的 可能性（与should表推断时相似）,有时可译为很可能；准是”语气比must要弱）。 3. ought to的否定形式为ought not to或ought n't to,其一般疑问句形式是将ought置于主语前。 ①We ought not to start so late.我们不该这么晚动身。 4. 在反意疑问句中,常省掉to用ought n't或should n't。 ① He ought to take back what he has said, ought n' t/should n't he? 他应该收回他说的话，是吗？ 1 —1.写出下面句中黑体部分的意义 ① To keep fit, weought to lear n more about our body. _____ ① Youought not to do such a thing. _______ ① Itought to be a close game. _______ 1 —2.用ought完成句子 ①（尔不该责备他。You __________ （scold ）him. ①我明天该动身吗？一_______________ （_leave ［tomorrow? 是的，你应该。一Yes, you ought to ①我们现在应该走，是吗？We ought to go now, ______________ _? 二、have to, don't have to 与must n't 的用法 1. have to（口语中常用have got to）表示客观需要做的事情，意为必须；不 得不”有时态、人称和数的变化，其否定式和疑问式应由助动词do构成。 ① My brother was very ill, so I had to call the doctor in the middle of the ni ght. 我弟弟病了，我不得不半夜里把医生请来。
巧记跟不定式和动名词做宾语的动词用法 语法体现语言的规律,学好英语离不开语法学习。其中，动词的用法是重点，也是难点。对于谓语动词和非谓语动词的用法，学生普遍感到困难。学生感到50多个动词，用法难以掌握，但调整了单词的排列顺序，根据汉意编写顺口溜会方便记忆： （一）跟不定时作宾语的动词有： 打算(intend)计划(plan)和期盼(expect/desire) 假装(pretend)喜欢(would like/love/prefer)表祝愿(wish) 决定(decide)同意(agree)来帮助(help) 设法(manage)说服(persuade)不拒绝(refuse) 好像(seem/appear)答应(promise)做努力(attempt) 选择(choose)询问(ask)多学习(learn) 告诉(tell)失败(fail)也付得起(afford) 不定式宾语要牢记！ （二）跟动名词作宾语的动词有： 考虑（consider）完成（finish）多练习（practise） 避免（avoid）冒险（risk）求建议（suggest/recoomend） 面对（face）喜欢（enjoy/appreciate）和介意(mind) 允许（allow）承认（admit/permit）或放弃(give up/abandon) 推迟（put off/delay/postphone）逃避（escape）不原谅（excuse/pardon）提及（mention）坚持(keep/insist on）要想象（imagine/fancy） 还有词组feel like 和can’t stand！ 瞧！，我们就这样快快乐乐地记住了吧！ （三）在动词remember, try, regret, forget, need/want/require， stop, mean等后跟动名词V-和不定式意义不同，巧记一句话（记住努力；后悔忘记；需要停止；很有意义），学习采用对比法： remember to do something记着去做某事（现在还没有做） remember doing something记着曾做过某事（以前做过某事） try to do something努力、尽力做某事 try doing something试着做某事（看能否达到预期的结果） stop to do something开始做某事（停下正在做的事，开始做另一事） stop doing something停止做某事（停止正在做的事） regret to do something对将来做的事感到遗憾、惋惜 regret doing something对已经做过的事感到后悔
高考英语语法专项复习学案2011-4-30 助动词与情态动词 (一)助动词有be, have, do, will, sha U 它们本身没有词义，只和实义动词的一定形式构成复合谓语，用来表示时态和语态，构成否定、疑问及加强语 气等。/ 1、be (am, is, are, were, been) (I) “ be +-ing”构成进行时态；(2) “ be +过去分词”构成被动语态；(3) “ be + 动词 不定式”构成复合谓语：①表示按计划安排要发生的事。The P rime minister is to visit Japan next year.总理将于明年访问日 ② 用于命令。You're to do your homework before you watch TW尔得做完了作业才能 看电视。 2、have (has, had) ⑴“ have+过去分词”构成完成时态。如：Have you seen the film ? (2)“ have been + -ing' 构成完成进行时态。如：What have you been doing these days?这些日子你一直在干什么？ 3、do (does, did) (1)“do not +动词原形”构成行为动词的否定
式。如：His brother does” tiike playing basket.；(2) “ Do + 主语+ 动词原形”构成行为动词的一般疑问句。Does he go to school by bike every day? (3f do + 动词原形”用于肯定祈使句或陈述句中表示加强语气。如：I did go to see him, but he wasn in我确实去看望他了，但他不在家。Do do some work.请一定做点什么；(4)代替前面刚出现的动词以避免重复。My mother told me to go to bed early. So I did. 4.will, shall (would, should) “ will (shall+动词原形”构成一般将来时，一般来说shall用于第一人称，will用于第二人称或第三人称，口语中常用will代替shll，如：We will have a meeting to discuss the p roblem. (二)情态动词情态动词表示说话人对某一动作或状态的态度，可以表示“可能”、“可以”、“需要”、“必须”或“应当”等之意。情态动词没有人称和数的变化。但不能单独作谓语动词用，必须和不带to的不定式连用构成谓语动词。只有情态动词ought要和带to的动词不定式连用，在句中作谓语用。 将情态动词置于主语之前即构成其疑问式，在情态动词之后加not既构成其否定式。现将各情态
动词第三人称单数形式的练习 动词的变化规则 1．一般情况下,直接加－s ２.以s. x.ｓh. ch.o结尾，加-ｅs 3．以“辅音字母+ｙ”结尾，变y为i, 再加-eｓ 一、写出下列动词的第三人称单数 dｒinｋ_____＿__ ｇo ＿___＿＿_sｔay ________ makｅ___＿＿＿__ lｏｏk _＿＿＿_＿＿__have_____＿＿push_＿___＿_ carrｙ_______ cｏｍｅ＿＿_____＿watcｈ______ ｒeａd______＿ｆly _＿＿_____ ｓtuｄy___＿＿__bruｓh＿______＿do＿___＿＿___ teach＿______ dｒｉve ＿______ ｗｏrk___＿_＿_ｈelp______takｅ______ like _______ ｄｒａw _＿__＿__ wｒiｔe ___＿__ fiｎd ＿＿____＿ 二．用括号内动词的适当形式填空。 1.Ｈe oｆteｎ____＿___（ｈaｖe) diｎner at home. 2．We _＿__＿_＿＿＿___（ｎoｔwaｔch) TV on Mｏnday. 3.Mike _＿＿___＿__＿__(ｎｏt go）toｔhe ｚｏo ｏn Ｓuｎｄａy. 4.＿＿＿＿_＿(do）ｔhey ___＿____(ｌiｋe) reaｄing stｏries? 5.What __＿____(do）tｈeyｏｆtｅn _＿_____(do) on Saturdays？ ６.___＿＿＿＿（ｄo)yｏｕr pａrentｓ＿____＿＿(rｅaｄ)newｓpaｐerｓevｅry day？ 7.Theｇiｒl＿_＿___＿(tｅach)us Engｌｉsh on Suｎｄａｙｓ. 8.Shｅand Ｉ________(take）a wａlk ｔogetｈeｒｅverｙｅvening． 9.Thｅre ________(be) sｏme ｗatｅr ｉnｔhe bottle. 1０.Mike_____＿_(like) ｃookiｎg. 1１.Thｅy _＿_＿＿__(havｅ)thｅsame hobby. 12.My aｕｎt___＿_＿_（loｏk) afｔer ｈｅr baby caｒefully. 13.He ｃａn____＿__（dｏ)hｉs hoｍework ｗell． １４.My faｔｈerｉs aｆactｏry wｏrker. He ______（mａke) ｔｏｙcars． 1５.Ｓhe ＿______(go)to school froｍＭonday to Ｆriday. 16.Liu Ｔao ______＿(do) nｏt like PE. 17.Ｔhｅboy ofteｎ＿＿＿＿___(ｗａｔcｈ) TV iｎthｅevenｉng. 1８.Su Hai anｄSu Yaｎｇ＿__＿___(have) eight ｌeｓsons thiｓterｍ. 19.I liｋe ____＿_______ (ｓwｉm). 20.He ＿______＿＿(rｅad)Enｇlish ｅｖｅrｙｄay. 21.We _____＿＿__(go）tｏschooｌａt ｓｅveｎin the moｒning. 23.My mｏtｈeｒ2２.Miｋe＿_______(ｇo)to scｈoｏl ａｔｓeｖen iｎthe ｍorninｇ. ? ___＿__＿＿(like）__＿＿＿_(gｏ) shopping． 24.Ｉcan __＿＿____(dｒａｗ）mａny bｅａuｔｉful picturｅｓ. 25.She＿__＿＿_＿__(make) a model plaｎe. 27.Doｅs hｅ_____＿＿__(lik 2６.Do yｏu ＿__＿__＿＿(lｉke)_________(rｕn)? ? ｅ)_________(jumｐ）? 29.Thｅ28.Ｄoｅs Ｎancｙ__＿__＿___(haｖe) an Engliｓh lessｏｎｏn Satuｒｄay ?? teachｅｒｓ____＿___（like)＿＿＿___＿__＿_(dａncｅ）. 30.Ｔhe teacheｒ_____＿__(lｉke）＿____＿_____＿(dａnｃe)．
动词不定式用法 动词不定式没有人称和数的变化，在句中不能独立作谓语。但动词不定式具有名词、形容词和副词特征，在句中可以作主语、宾语、宾语补足语、定语、表语和状语等多种成分。另外，动词不定式具有动词特点，可以有自己的宾语和状语，组成动词不定式短语。动词不定式的肯定形式是to＋do；其否定形式是not to＋do。 下面以动词不定式在句中的作用来予以详细说明。 1．作主语 可以直接作主语。如：To see is to believe． 但在英语中，常用it作形式主语，真正的主语即动词不定式放在后面。如： It's wrong to play tricks on other people． It's our duty to keep our environment clean and tidy． 点击规律：动词不定式在句中作主语时，常放在It is ＋adj +(for sb.)＋(not)to do sth句型中，表示说话人对客观事件的决断，意为：做…..是……的，it仅作形式主语，真正的主语是to do sth It is very interesting to read.读书是有趣的 It is useful to read.看书是有用的 It is healthy to run every day.每天跑步是健康的 It is a little difficulty for me to work out this question.解出这道题对我来说有点难 It is bad not to finish homework.不完成作业是糟糕的 It is bad to be late for school.迟到是糟糕的 It is+adj+of sb +(not)to do sth该句型通常表示说话人对客观事件的惊讶、兴奋、懊悔、难过等感叹情绪，与It is ＋adj +(for sb.)＋(not)to do sth的意义不同。 It is very kind of you to tell me the truth．你能告诉我事实，真是太好了 It is stupid of him to do such a silly thing．他做那件傻事，真是太笨了 It is very clever of you to work out this question. 你能解出这道题目，真是太聪明了 It is very wise of you to read this novel. 你看这本小说，真是太明智了 这个句型中用介词of而不是for的原因是这里的形容词是用来形容人的品质性格的。 类似的词有：careless，careful，clever，considerate，foolish，good，impolite，kind，naughty，nice，silly，stupid，friendly 因此区分是用It is ＋adj +(for sb.)＋(not)to do sth还是It is+adj+of sb +(not)to do sth，要
Modal Verbs 情态动词有can (could), may (might), must (must), have to, shall (should), will (would), need (need), dare (dared), ought to 等。情态动词无人称和数的变化。它不能单独使用，必须跟其后的动词原形构成谓语。情态动词的具体用法如下： 一、can, could 1、表示能力。 a. Can you speak English? b. Can you finish this work tonight? c. Man cannot live without air. Note:
(1) can表示能力时，可用be able to 代替。 a. I’ll not be able to come this afternoon. (2) 当我们要表示“某件事情已经 成功”时，应用was/ were able to , 不能用could a. He saw well and he was able to swim to the river when the flood happened. b. He was able to go to the party yesterday evening and he enjoyed himself very much. 2、表示客观可能性
a. People who live near airports can have their hearing harmed. b. The boy can sometimes be very naughty. （表示某人或某物一时的情况，“有时会。。。”） c. The invention can be improve d. d. Even experts can make mistakes. e. He can’t be in Beijing now because I saw him a moment ago. f. He had a lot of work to do last night, so he couldn’t have gone to see a film. Note: 在肯定句中用can表示可能性时，其含义是理论上的可能性，不表示
一、教学内容：情态动词 二、教学目标： 1、掌握情态动词的基本用法 2、掌握情态动词辨析 三、教学重难点： 1、从整体上把握情态动词的语法和语义特征 2、掌握每个情态动词在实际语境中的用法特点及功能 四、教学过程 （一）情态动词的基本用法 1、情态动词的类型和特征 2、情态动词的用法 （1）can/could的用法 以can开头的一般疑问句，其肯定与否定回答分别用can和can’t. （2）may/might的用法
?can 和may都可用来表征求意见或许可，意为“可以“，一般可互换。 （3）must的用法 ?在疑问句和否定句中一般用can 表示推测，否定句中也可用may，但may not表示“可能不“，而can’t表示”不可能“。在否定句中，mustn’t表示禁止，”不允许“。 （4）need 和dare的用法 二者既可作情态动词也可作实义动词
（5）shall(should),will(would)的用法 （6）题组练习 ?Don’t drive too fast, or you ＿＿＿have a accident. ?May I park my car here? No, you ＿＿＿.You should park the car in the car park. ?What a nice day! ＿＿＿we go surfing? Good idea. ?You ＿＿＿worry about him. He is old enough to look after himself. ?There is a book on the ground. It ＿＿＿be John’s. Look! His photo is in it. ? A teacher ＿＿＿also make a mistake if he is not careful enough.
英语情态动词的用法大全附解析 一、初中英语情态动词 1．—We've got everything ready for the picnic. —Do you mean I __________ bring anything with me? A. can't B. mustn't C. couldn't D. needn't 【答案】 D 【解析】【分析】句意：—我们已经为野餐准备好了一切。—你的意思是我不必带任何东西吗？A. can't 不能；B. mustn't 表示禁止，一定不要；C. couldn't不能，表示过去时态；D. needn't不必。结合句意，故选D。 【点评】本题考查情态动词的用法。 2．—How amazing this robot is! —Wow, it has video cameras in its eyes, so it “see” and interact with pe ople. A. may B. can C. must D. should 【答案】 B 【解析】【分析】句意：—这个机器人多么惊人啊！—哇，在它的眼睛里有摄像机，因此它能看见和人打交道。A. may 可以，可能；表示许可，B. can 能；表示能力，C. must 必须；D. should应该；根据it has video cameras in its eyes,可知是有能力看见，故选B。 【点评】考查情态动词辨析。熟记情态动词的含义和用法。 3．—Where is George? —He _______ be here just now. His coffee is still warm. A. need B. can't C. must D. shouldn't 【答案】 C 【解析】【分析】句意：——乔治在哪里？——他刚才一定在这里，他的咖啡还是热的。A. need需要； B. can't 不能，不可能（表示推测）； C. must 必须，一定（表示推测）； D. shouldn't不应该；根据His coffee is still warm.可知表示肯定推测一定在这儿；故答案为C。 【点评】考查情态动词。掌握情态动词表推测时的意义和用法。 4．— Sorry, I forgot to take money with me. Maybe I can't buy the book you like. — Mum, you ______ worry about it. We can pay by Alipay （支付宝）. A. can't B. needn't C. mustn't D. shouldn't 【答案】 B 【解析】【分析】句意：——对不起，我忘记带钱了。也许我不能买你喜欢的书。——妈妈，你不用担心。我们可以用支付宝支付。A. can't不能，指不允许或否定推测；B. needn't 不需，指没必要；C. mustn't不能，表禁止；D. shouldn't不应该，表建议。根据句意语境，本句是说妈妈不需要担心，故答案为B。 【点评】考查情态动词。理解句意并掌握情态动词的意义和用法区别。
高中英语语法总结大全之情态动词 情态动词的语法特征 1）情态动词不能表示正在发生或已经发生的事情，只表示期待或估计某事的发生。 2）情态动词除ought 和have 外，后面只能接不带to 的不定式。 3）情态动词没有人称，数的变化，即情态动词第三人称单数不加-s。 4）情态动词没有非谓语形式，即没有不定式，分词，等形式。 比较can 和be able to 1）can，could 表示能力；可能(过去时用could), 只用于现在式和过去式(could)。be able to可以用于各种时态。 They will be able to tell you the news soon. 他很快就能告诉你消息了。 2）只用be able to a. 位于助动词后。 b. 情态动词后。 c. 表示过去某时刻动作时。 d. 用于句首表示条件。 e. 表示成功地做了某事时，只能用was/were able to，不能用could。 He was able to flee Europe before the war broke out. = He managed to flee Europe before the war broke out. 注意：could不表示时态 1）提出委婉的请求，（注意在回答中不可用could）。 --- Could I have the television on? --- Y es, you can. / No, you can't. 2）在否定，疑问句中表示推测或怀疑。 He couldn't be a bad man. 他不大可能是坏人。 比较may和might 1）表示允许或请求；表示没有把握的推测；may 放在句首，表示祝愿。 May God bless you!
第三人称单数练习题 一、写出下列动词的第三人称单数 drink go stay make look have pass carry come watch plant fly teach study brush do 二、用括号内动词的适当形式填空。 1.He often (have) dinner at home. 2.Daniel and Tommy (be) in Class One. 3.We (not watch) TV on Monday. 4.Nick (not go) to the zoo on Sunday. 5.they (like) the World Cup? 6.What they often (do) on Saturdays? 7.your parents (read) newspapers every day? 8.The girl (teach) us English on Sundays. 9.She and I (take) a walk together every evening. 10.There (be) some water in the bottle. 11.Mike (like) cooking. 12.They (have) the same hobby. 13.My aunt (look) after her baby carefully. 14.You always (do) your homework well. 15.I (be) ill. I’m staying in bed. 16.She (go) to school from Monday to Friday. 17.Liu Tao (do) not like PE. 18.The child often (watch) TV in the evening. 19.Su Hai and Su Yang (have) eight lessons this term. 20.－What day (be) it today? －It’s Saturday .三、按照要求改写句子 1.Daniel watches TV every evening.(改为否定句) 2.I do my homework every day.(改为一般疑问句，作否定回答) 3.She likes milk.(改为一般疑问句，作肯定回答) 4.Amy likes playing computer games.(改为一般疑问句，作否定回答) 5.We go to school every morning.(改为否定句) 6.He speaks English very well.(改为否定句)
英语情态动词用法详解 一、单项选择情态动词 1．Look! There are so many mistakes in your composition. You ________ have fixed full attention on it. A．can B．should C．need D．might 【答案】B 【解析】 【详解】 考查情态动词。句意：看！你的作文里有那么多的错误。你本应该把所有的注意力都集中在它上面的。表示“本应该做但实际上没有做”应该用should have done结构，can have done 表示可能；need表示需要；might have done表示可能做过某事；故选B。 2．---Hi, Johnson, any idea where Susan is? ---It is class time, so she __________ in the classroom now. A．can be B．must have been C．might have been D．should be 【答案】D 【解析】 考查情态动词的用法。A. can be可能，可以是；B. must have been一定（对过去事实肯定的推测）；C. might have been可能（对过去事实肯定的推测）；D. should be应该是。句意：—知道苏珊在哪里吗？—现在是上课时间，她应该在教室里。故答案选D。 3．The room is so clean. He ________ have cleaned it yesterday evening. A．will B．need C．can D．must 【答案】D 【解析】 【详解】 考查情态动词表推测。句意：房间如此干净，他一定是昨天晚上打扫过了。must have done 表示对过去发生的事情有把握的猜测，意思是“一定（做过）”，故D项正确。 4．— Excuse me, do you mind if I open the window? — Well, if you __________. I can put on more clothes. A．can B．may C．must D．shall 【答案】C 【解析】
语法点： 1、主语是第三人称单数(简称“三单”)形式，动词也要用“三单” 形式，动词原型变为动词“三单”形式的变化规则详见笔记。例: She goes to school on foot. 2、like+动词ing，动词原型变为动词ing形式的变化规则如下： 1) 一般情况直接+ing 例：teach变为teaching 2) 以不发音e结尾的单词去e在加ing例:da nee变为dancing 3) 以一个辅音字母结尾的重读闭音节，双写最后一个辅音字 母，再加+ing 例：run 变为running 3、加了助动词do/does(does只用于主语是“三单”时)，后面的动 词要用原型。例：What does she do?(她是做什么的？) 4、改一般疑问句和否定句的方法详见笔记，注意填空题中(not go) (not watch)意为将此句改为否定句，同理，加了否定形式的助动 词don '/doesn '，后面的动词也要用原型。 一、写出下列动词的第三人称单数 drink ________ g o _______stay ________ make _______ look _________ h ave _______ pass ______ carry ____ come ________ watch _______ p lant ______ fly ________ study ______ brush _______ do________ teach _______ 二、用括号内动词的适当形式填空 1. He ofte n ______ (have) dinner at home. 2. Dan iel and Tommy _____ (be) in Class One. 3. We _______ (not watch) TV on Mo nday. 4. Nick ______ (not go) to the zoo on Sun day.
be+不定式动词 be+不定式动词”在不同情况下，可以表示很多种不同的语义。下面便是其中九种： 一、表示坚决的命令。例如： 1. This naughty boy is to stay here until the class is over. 2. No one is to enter this building without the permission of the security guard. 二、表示计划”或安排的事项”例如： 3. Betty is to be married soon. 4. An in sura nee age nt is to meet us this after noon. 三、表示可能性”例如： 5. Are you to pay the debt for your wife? 6. The lovely puppy is no where to be found. 四、表示意图”或打算”例如： 7. If you are to be there on time, you had better hurry. 8. If all of us are to rema in frie ndly, we must be sin cere with one ano ther. 五、表示应该”例如： 9. You have done so well. You are to be rewarded. 10. Such n asty questi ons are to be avoided. 六、表示不可避免”例如： 11. Anne was won deri ng what was to become of her boy frie nd. Tommy. 12. The murderer was senten ced to life impris onment and was n ever to see his family aga in. 七、表示假设”例如： 13. If I were to do it, I would do it well. 14. Even if you were to take a taxi now, you would not be able to arrive at your destination on time. 八、有期待将来”的含意。例如： 15. The actual usef uln ess of the n ewly inven ted equipme nt is still to be