7BUnit6Grammarzhf.ppt

1、Unit 6 Grammar,Modal Verbs,I can sing beautiful songs. Can you?,No, I cant. But I can play konfu. Can you?,1,Group 7,语法学习：情态动词 情态动词有一定的词义，表示某种感情和语气，但_(能/不能)单独作谓语，需要和其他动词（原形）一起构成谓语。变否定,在情态动词后加_；变疑问将情态动词_。情态动词_ (有/没有)人称和数的变化。常用的情态动词有： can _ (do) may _ (do) must _ (do) need _ (do) should _ (do),2,能,not

2、,提前,没有,do,do,do,do,do,I can do “_” 过去式/(委婉语气) _,1 肯定句 I _ _. 我会游泳。 否定句 I _ _. 我不会游泳。 一般疑问句 _ you _? 你会游泳吗？ 肯定回答 Yes, I _. 是的，我会。 否定回答 No, I _. 不， 我不会。,根据要求完成下列句子。,3,We can use electricity to do many things. We cannot(cant) touch electricity. Can you think of an example? Yes, I can./ No, I cannot(can

3、t).,可以/会,could,can swim,cant swim,Can swim,can,cant,能力 2.许可,Group 6,II may “_” 过去式/(委婉语气) _,肯定句 You _ _ it away. 你可以把它拿走。 否定句 You _ _ _ it away. 你不可以把它拿走 一般疑问句 _ I _ it away? 我可以把它拿走吗？ 肯定回答 Yes, _ _. 是的，你可以。 否定回答 No, _ _. 不，你不应该。,表示请求或允许做某事（许可）,4,May/Can I use you mobile phone? Yes, you may/can. No,

4、you may not/cant/mustnt.,可以,might,may take,may not take,May take,you may,you mustnt,Yes, _.,_?,Lets talk!,May I sit down,you may/can,Group 5,III must _ （禁止做某事）, _过去时,1 肯定句She _ _(必须完成) her work today. 否定句 She _ _ her work today. 一般疑问句 _ she _ her work today? 肯定回答 Yes, _ _. 是的,她必须。 否定回答No, _ _/doesnt

5、 have to.不,她不需要。,5,You must not/mustnt do that Benny! We must always be careful with electricity. They must not/mustnt play near the heater.,must finish,mustnt finish,Must finish,she must,she neednt,必须,没有,-What must we do? -We _.,Lets talk!,-What mustnt we do? -We _.,must save water,mustnt smoke,Gro

6、up 4,7,IV need “_”; 作情态动词 _过去时,肯定句 You _ _ it here. 你需要把它拿来。 否定句 You _ _ it here. 你没有必要把它拿来 一般疑问句 _ I _ it here?需要我把它拿来吗？ 肯定回答 Yes, _ _. 是的，你必须。 否定回答 No, _ _. 不，没有必要。,You neednt worry about your baby. Need I finish the work? Yes, you must. No,you neednt. You can do it later.,need bring,neednt bring,

7、Need bring,you must,you neednt,需要,没有,V should “_” 表义务或主观,_过去式 肯定句 We _ _ hard. 我们应该努力学习。 一般疑问 _ we _ hard? Yes, we _. 否定句We _ _ water.我们不应浪费水。 特殊疑问What _ we _ now? 我们该怎么办?,should =ought to ； shouldnt = _ _ _,6,Should we help her?,Yes, we should. Should we waste water?,No, we shouldnt.,should study,S

8、hould study,should,shouldnt waste,should do,应该,没有,ought not to,Group 3,The teacher said angrily, “before you have class.”,My bike is broken, .,I missed the bus, .,I wanted to ,my mother may say angrily, “ .”,We must study hard to build our country. My bike was broken. I had to walk home. It will rai

9、n tomorrow. We will have to stay home.,VI 比较must 与have to 的用法,我必须先完成我的作业。 I _ _ my homework first. 昨天我妈生病了,我不得不照顾她. My mother was ill yesterday. I _ _ _ _ her.,must “_” 受_(主观/客观)所制约 have to “_” 受_(主观/客观)所制约 must _(有/没有)时态变化; have to 过去时_ 和将来时_。 have to否定式：_,8,必须,主观,不得不,客观,没有,had to,will have to,助v.+

10、not have to,must finish,had to look after,VII 比较 can 和 be able to的用法区别 : eg. 1. He worked hard, then he _ (能够完成) the difficult job. 2. He _(能够画) at the age of five. 3. She can come tomorrow . = She _ _ _ _ _ tomorrow.,can do _(自身能力/经过努力) 能做某事 过去时：_ be able to do _(自身能力/经过努力) 能做 I _/You _/He_ /They_

11、able to多种时态; 过去时_, 将来时_.,9,He could draw when he was five. After three months training, I was able to swim. Three years later, we will be able to improve here.,自身能力,could do,经过努力,am,are,is,are,was/were able to,will be able to,was able to finish,could draw,will be able to come,Group 2,must “_” (表示肯定的

12、猜测) may “_” (表示不太肯定的推测) cant “_” (表示否定的猜测),VIII can , may , must 用于表示推测时的使用:,10,Exercises: I saw her in the library just now. She _ be here in the classroom. I am not sure. I _ go to see a film with you. It _ be his homework. Theres his name on it.,The light in her house is on, she must be at home.

13、I am not sure, she may be at home. He went home. It cant be him at the office.,一定,可能,一定不,cant,may,must,Group 1,1.-Your son is much better, you _ worry about him. -Thanks, doctor. A.shant B.neednt C. mustnt D.cant 2.-Must I stay at home, Mum? -No, you _. A.neednt. B.mustnt C. dont D.may not 3.-May I

14、go out to play basketball, Dad? -No, you _. You _ finish your homework first. A.mustnt; can B. mustnt; can C.cant; must D. cant; may,Test for your ability,4.-Need I attend the meeting the meeting? -Yes, you _. A.can B. may C. must D. need 5.-Could I borrow your dictionary? -Yes, you _. Here you are.

15、 A. might B. must C. can D. should 6.-_ the man there be our new teacher? -He _ be, but Im not sure. A.May, mustnt B.Can; may C.Must; cant D. Can; cant 7.My bike was broken, I _ walk home. A.may B. must C. had to D. might 8.Students _ smoke. A.maynt B. mustnt C. might notD.neednt,1.-I think the man

16、over there must be Bob. -It _ be him. He has gone to Beijing.(11) A.can B.may C. must D.cant 2. According to the new traffic laws, people _ drive after drinking wine or beer.(11) A.wouldnt B.couldntC. needntD.mustnt 3.-May we leave the classroom? -No, you _. You _ to leave until the bell rings. (2010) A.mustnt; allow B. mustnt; are allowed C.neednt; allow D. neednt; arent allowed,中考连接,4.It rained heavily,so we _ stay home.(2011) A. couldB. had to C. must D. need 5.-Would you come to my party?