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1、助动词的用法助动词的用法授课人：杨琳授课人：杨琳 We are having an English class.I have seen the film.He didnt go home last night.We will fly for Africa next month.帮助主要动词帮助主要动词have构成现在构成现在进行时进行时帮助主要动词帮助主要动词see构成现在构成现在完成时完成时帮助主要动词帮助主要动词go构成一般构成一般过去时过去时帮助主要动词帮助主要动词fly构成一般构成一般将来时将来时Whats the function of the underlined words?He
2、 was sent to England.I would fly to Sweden if I were a bird.Had I lived in London,I would have been to London Bridge.Whats the function of the underlined words?帮助主要动词帮助主要动词send构成被动构成被动语态语态帮助主要动词构成虚拟帮助主要动词构成虚拟语气语气1 助动词和其他动词一起构成时态、语气和助动词和其他动词一起构成时态、语气和语态。可以用作助动词的有语态。可以用作助动词的有be、do、have和情态动词。和情态动词。帮助主要
3、动词构成虚拟帮助主要动词构成虚拟语气语气Do you like college life?Did you study English before you came here?I do not like him.Do call me tomorrow.He did know that.Whats the function of“do/did”?构成疑问构成疑问句句构成疑问句构成疑问句构成否定构成否定句句构成强调结构构成强调结构构成强调结构构成强调结构助动词还可用来构成否定或疑问句，以助动词还可用来构成否定或疑问句，以及强调结构。及强调结构。总结：总结：助动词是帮助主要动词构成各种时态助动词是帮
4、助主要动词构成各种时态,语态语态,语气以及否定或疑问结构的动词语气以及否定或疑问结构的动词.助动词分为时态助动词和结构助动词两种助动词分为时态助动词和结构助动词两种1.助动词助动词be的用法的用法1）be+现在分词，构成进行时态They are having a meeting.他们正在开会。English is becoming more and more important.英语现在越来越重要。2）be+过去分词，构成被动语态。过去分词，构成被动语态。The window was broken by Tom.窗户是汤姆打碎的。English is taught throughout the
5、 world.世界各地都教英语。3）be+动词不定式，可表示下列内容：动词不定式，可表示下列内容：a.表示最近、未来的计划或安排。表示最近、未来的计划或安排。He is to go to New York next week.他下周要去纽约。We are to teach the freshmen.我们要教新生。b.表示命令You are to explain this.对此你要做出解He is to come to the office this afternoon.要他今天下午来办公室。c.征求意见征求意见How am I to answer him?我该怎样答复他？Who is to g
6、o there?谁该去那儿呢？d.表示相约、商定表示相约、商定We are to meet at the school gate at seven tomorrow morning.我们明天早晨7点在校门口集合。2.助动词助动词have的用法的用法1）have+过去分词，构成完成时态。He has left for London.他已去了伦敦。By the end of last month,they had finished half of their work.上月未为止，他们已经完成工作的一半。2）have+been+现在分词，构成完成进行时I have been studying En
7、glish for ten years.我一直在学英语，已达十年之久。3）have+been+过去分词，构成完成式被动语态。English has been taught in China for many years.中国教英语已经多年。3.助动词助动词do 的用法的用法1）构成一般疑问句。）构成一般疑问句。Do you want to pass the CET?你想通过大学英语测试吗？Did you study German?你们学过德语吗？2）do+not 构成否定句。构成否定句。I do not want to be criticized.我不想挨批评He doesnt like to
8、 study.他不想学习。In the past,many students did not know the importance of English.3）构成否定祈使句。构成否定祈使句。Dont be so absent-minded.不要这么心不在焉说明：构成否定祈使句只用do，不用did和does。4）放在动词原形前，加强该动词的语气。）放在动词原形前，加强该动词的语气。Do come to my birthday party.一定来参加我的生日宴会。I did go there.我确实去那儿了。5）用于倒装句。）用于倒装句。Never did I hear of such a th
9、ing.我从未听说过这样的事情。Only when we begin our college life do we realize the importance of English.进了大学以后，我们才认识到英语的重要性说明：引导此类倒装句的副词有never,seldom,rarely,little,only,so,not only.but also4.助动词助动词shall和和will的用法的用法shall和will作为助动词可以与动词原形一起构成一般将来时。I shall study harder at English.我将更加努力地学习英语。He will go to Shanghai
10、.他要去上海。说明：现在，尤其是在口语中，will常用于各种人称，但shall只用于第一人称，如用于第二、第三人称，就失去助动词的意义，已变为情态动词，试比较:He shall come.他必须来。（shall有命令的意味。）He will come.他要来。（will只与动词原形构成一般将来时。）5.助动词助动词should,would的用法的用法1）should无词义，只是shall的过去形式，与动词原形构成过去将来时，只用于第一人称I telephoned him yesterday to ask what I should do next week.我昨天给他打电话，问他我下周干什么。
11、比较：What shall I do next week?I asked.“我下周干什么？我问道。可以说，shall变成间接引语时，变成了should。2）would也无词义，是will的过去形式，与动词原形构成过去将来时，用于第二、第三人称。He said he would come.他说他要来。练习练习1：请在划线处填入适当的助动词。：请在划线处填入适当的助动词。1We _ go to London first.2The modern Olympic Games _held in 1896,in Athens.3 What _ you do if you had a billion?4 H
12、ope you wont have to wait as long as we _.Good luck.5As you can see,I _escape.6 He has made great progress recently,and so _you.willwerewoulddiddidhave练习练习2：Translate the following sentences.1.你打电话时，我正在洗澡。你打电话时，我正在洗澡。2.孩子们被照顾得很好。孩子们被照顾得很好。3.我学法语已经三年了我学法语已经三年了4.你去过长城吗你去过长城吗？I was having a bath when y
13、ou called.The children are taken good care of.I have been studying French for three years.Have you been to the Great wall?5.我不知道那本小说的名字。我不知道那本小说的名字。6.我确实认为你该去。我确实认为你该去。7.明年你要毕业了吗？明年你要毕业了吗？8.他告诉我们他要出国学习了。他告诉我们他要出国学习了。9.下周我就要搬进新房子了。下周我就要搬进新房子了。I dont know the name of that novel.I do think you should g
14、o.Will you graduate next year?He told us that he would study abroad.I shall move to the new house next week.1.Jacks ill，so they _ change their plans.A.must B.should C.have got to D.ought to2.If it is fine tomorrow,we _ a football match.A.have B.will have C.has D.shall has 3.In the past 30 years Chin
15、a _ great advances in the socialist revolution and socialist construction.A.has made B.have made C.had made D.having made4.I _ go to bed until I _ finished my work.A.dont/had B.didnt/have C.didnt/had D.dont/have 5.When he was at school,he _ early and take a walk before breakfast.A.will rise B.shall rise C.should rise D.would rise 谢谢！谢谢！