李朝阳修改成功最终版本.ppt

1.助动词be 1.助动词be+现在分词构成进行时 The students are having class. 2.助动词be+过去分词构成被动语态。 The baby was put in bed by his mother. 2.助动词have/has/had 1.助动词have/has/had+过去分词构成完成时。 We have learnt English for five years. 2.助动词have/has/had+been+现在分词构成完成进行时 He has been living in Beijing sincu he was born. 3.助动词do/does/did 助动词do/does/did用于疑问句、倒装句、否定句、加强语气以及代替前面出现的动词等。 Do you live in China ？ ——Yes ，I do. 4.助动词will/shall/would 助动词will/shall/would用于构成将来时。Shall仅用于第一人称，will可以用于各种人称 There will be more trees in one hundred years.  1)(表示能力)能……；会…… 与be able to基本相 She can drive，but she can’t ride a bicycle. (2)(表示可能、许可）可能、可以…… 常用于疑问句和否定句 Can I use your telephone？He can’t be our teacher. (3)(表温和的命令)请做……，得……I’ll do the cooking，and you can do the washing. (4）can’t 可用来回答May I …? -May I go home now? – Sorry, you can’t. (5)could 是can的过去式，但可以表示委婉语。 Could you please wash the clothes? (1)(表准许、许可)可以……You may go home now，Susan. May I have a word with you，please？ (2）（表示推测），可能…… It may rain tomorrow. (3)(表愿望、祝福)但愿；祝……May you succeed！ 。 (1)(表义务、必要性、命令)必须，得，要-Must I wash the dishes at once -No，you needn’t.” (2)mustn’t表“禁止、不准”。 You mustn’t play with the knife (3)(表必然性)必定，一定 Everyone must die. He is so happy. He must pass the exam. (4) 回答Must…? 肯定用must, 否定用needn’t 或not have to -Must I clean my room now? -Yes, you must. /-No, you needn’t/ don’t have to. 用于疑问句中，与第一、三人称连用，表示征求对方的意见Shall she go to the concert with us this evening?Shall we go out for a walk?may用于征求对方的许可，shall用于征求对方的意见或指示。May I have a look？我能看一下吗？Shall I have a look？要我看一下吗？ (1)(表义务、责任)应该We should attend the meeting.我们应该参加这次会议。(2)(表预期)应该会，想必会，一定会……吧The concert should be great fun.音乐会一定会很有意思。(3)(表惊讶、遗憾)竟然；居然I’m glad that your story should have won the first prize.我很高兴你的小说居然赢得头奖。(4)(与疑问词连用，表示意外、纳闷、惊讶等)究竟是；到底Who should come in but my old friend Betty！我当是谁进来了呢，原来是我的老朋友贝蒂呀！(5)(用于条件状语从句中)一旦；万一If she should know the truth，she would be greatly depressed.万一