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1、情態(tài)動詞 Modal Verbs,can / could,may / might,shall / should,will / would,must,need,dare,ought to,have to,used to,情態(tài)動詞的基本用法特點 1,情態(tài)動詞后面只能接_ 2, 情態(tài)動詞_(有/沒有)人稱,數(shù)的變化,即情態(tài)動詞第三人稱單數(shù)_(加/不加)-s。 但是有時態(tài)變化。 3,情態(tài)動詞不能單獨做謂語,必須和_ 一起構成謂語,動詞原形,沒有,不加,動詞,Nancy could dress herself up when she was only 5 years old. “ If you pass
2、 the exam, you shall get an iPad,” said his father. May I have a look at your new phone? If you drive like that, we might be late for the film. You should get up at six if you want to catch the train.,能力(ability),承諾(promise),請求(request),可能(possibility),建議(advice),6. I have finished all the homework,
3、 and I can go out and play basketball. 7. When he was in London, he would visit his uncle every week. 8. Jack never play tricks, so that cant be done by him. 9. It is nearly time for the meeting. Teddy should turn up at any moment.,許可(permission),過去的習慣(past habit),推測(guessing),推測(prediction),can/cou
4、ld,He can hold a small elephant.,1,表能力 (能夠),I could run fast then.,表請求,could比can更加委婉客氣 在此不是can的過去式。,2,表請求(能不能.),Can I borrow your dictionary?,Could I borrow your dictionary?,Yes, of course you can.,Anyone can make a mistake.,3,表理論和邏輯判斷上的可能性(可能),4,表允許 (可以),You can go now.,Look at the girl under the t
5、ree, can she be Mary?,3,表主觀猜測(可能.不可能.),She couldnt be telling lies just now.,can /could 表示推測時, 一般用在否定句或疑問句中。,It cant be Mary. She has fallen ill.,她剛剛不可能是在撒謊,can, could 和_的用法,This robot can help you do homework.,1.can, be able to都可表示“能力”,can的主語是人或物 be able to的主語是人,She can / is able to draw pictures w
6、ith left hand.,be able to,她能用左手畫畫,這個機器人能幫你做作業(yè),e.g. Well be able to finish the work soon. I havent been able to see the film.,2.can只用于現(xiàn)在時和過去時(could) beableto可以用于各種時態(tài)。,成功地做了某事時,只能用was/wereableto,不能用could。,He _escape fromEuropebefore thewarbrokeout. A. can B. would C. could D. was able to,D,1. A comput
7、er _ think for itself; it must be told what to do. A. cant B. couldnt C. may not D. is not able to,2. The fire spread through the hotel very quickly but everyone _ get out. A. had to B. would C. could D. was able to,A,D,3. They will _ run this machine on their own in three months. A. can B. could C.
8、 may D. be able to,D,may/might,1,表請求,許可 (可以),May I watch TV after supper, mom?,Certainly / Yes, please,Youd better not .,She may come tomorrow,I guess.,2,表猜測 (可能),He might be doing his homework now. but I am not sure.,might表推測時,不表示過去時 只是可能性比may小,May you succeed !,may/ might as well 不妨,還是.好,3,表祝愿(祝.)
9、,we may/might as well stay under the desk.,我們還是呆在桌子下面好,Tomorrow will be sunny.,1,表將來 (將會),2,表意愿 (愿意),用于陳述句,will/would,Honey, I will do everything for you .,In the past two years ,he would sit by the window everyday.,3,表某種傾向或習慣性動作(總是),Fish will die out of water.,will指一般情況,would用于描述過去的的習慣或例行的活動。,Will
10、you please turn down the radio? Would you like to join us ?,This machine wont work.,4,表請求,邀請,一般用于第二人稱疑問句中,5,表“不能”,機器出故障了,不管用了,表請求,邀請,建議,would比will更加委婉客氣 在此不是will的過去式。,shall,I shall attend your weeding with my new husband.We shall be there on time.,1,shall用于第一人稱,表將來(將要),Shall we go for a walk?,2,shall用于第一,三人稱,表示征求對方意見,When shall he be able to leave the hospital?,All the children shall go to school at the age of seven.,4,shall用于第三人稱陳述句表示 法律條文規(guī)定,should,You should study hard.,1,should表勸告和建議(應該),2,表推測,It is three oclock, the football game should begin now.,e.g.我
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