FestivalsGrammar.ppt

1、情态动词 Modal Verbs,can / could,may / might,shall / should,will / would,must,need,dare,ought to,have to,used to,情态动词的基本用法特点 1,情态动词后面只能接_ 2, 情态动词_（有/没有）人称，数的变化，即情态动词第三人称单数_（加/不加）-s。 但是有时态变化。 3，情态动词不能单独做谓语，必须和_ 一起构成谓语,动词原形,没有,不加,动词,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),承诺（promise),请求（request),可能（possibility),建议（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.,许可(permission),过去的习惯（past habit）,推测（guessing）,推测（prediction）,can/cou

4、ld,He can hold a small elephant.,1，表能力 (能够）,I could run fast then.,表请求，could比can更加委婉客气 在此不是can的过去式。,2，表请求(能不能.）,Can I borrow your dictionary?,Could I borrow your dictionary?,Yes, of course you can.,Anyone can make a mistake.,3，表理论和逻辑判断上的可能性（可能）,4，表允许 （可以）,You can go now.,Look at the girl under the t

5、ree, can she be Mary?,3，表主观猜测（可能.不可能.）,She couldnt be telling lies just now.,can /could 表示推测时， 一般用在否定句或疑问句中。,It cant be Mary. She has fallen ill.,她刚刚不可能是在撒谎,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的主语是人或物 be able to的主语是人,She can / is able to draw pictures w

6、ith left hand.,be able to,她能用左手画画,这个机器人能帮你做作业,e.g. Well be able to finish the work soon. I havent been able to see the film.,2.can只用于现在时和过去时(could) beableto可以用于各种时态。,成功地做了某事时，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，表请求,许可 （可以）,May I watch TV after supper， mom？,Certainly / Yes, please,Youd better not .,She may come tomorrow，I guess.,2，表猜测 （可能）,He might be doing his homework now. but I am not sure.,might表推测时，不表示过去时 只是可能性比may小,May you succeed !,may/ might as well 不妨，还是.好,3，表祝愿（祝.)

9、,we may/might as well stay under the desk.,我们还是呆在桌子下面好,Tomorrow will be sunny.,1，表将来 （将会）,2，表意愿 （愿意），用于陈述句,will/would,Honey, I will do everything for you .,In the past two years ,he would sit by the window everyday.,3，表某种倾向或习惯性动作（总是）,Fish will die out of water.,will指一般情况,would用于描述过去的的习惯或例行的活动。,Will

10、you please turn down the radio? Would you like to join us ?,This machine wont work.,4，表请求,邀请,一般用于第二人称疑问句中,5，表“不能”,机器出故障了，不管用了,表请求，邀请，建议，would比will更加委婉客气 在此不是will的过去式。,shall,I shall attend your weeding with my new husband.We shall be there on time.,1，shall用于第一人称，表将来（将要）,Shall we go for a walk?,2，shall用于第一，三人称，表示征求对方意见,When shall he be able to leave the hospital?,All the children shall go to school at the age of seven.,4，shall用于第三人称陈述句表示 法律条文规定,should,You should study hard.,1，should表劝告和建议（应该）,2，表推测,It is three oclock, the football game should begin now.,e.g.我