动词不定式的用法(共26张)课件.pptx

1、1考点梳理考点梳理 to do的用法的用法 动词不定式的构成：to动词原形(有些动词不定式需要不带to)。它没有人称和数的变化；在句中不能作谓语，但能保持动词的特点。21作主语常用it作形式主语，将真正的主语(动词不定式)置于句末。常用句型结构为“Itsadj./n.(for/of sb)to do sth.”如：To ask the teacher for help is necessary.It is necessary to ask the teacher for help.向老师求教是必要的。32作宾语(1)后接不定式作宾语的动词有：want,try,decide,hope,need,

2、wish,agree,expect,refuse,learn，remember,forget,would like/love等。如：I hope to get there before dark.我希望天黑以前到那儿。4 I found it difficult to solve the problem.我发现解决这个问题很难。53作定语(须后置)I dont have a partner to practice English with.我没有一个一起练习英语的同伴。I have something to tell you.我有一些事情要告诉你。64作表语 Their duty is to

3、look after the animals.他们的责任是照顾动物。75、作状语不定式作状语，常见的有目的状语、原因状语、结果状语等。To improve your English,you must keep practicing every day.为了提高你的英语，你必须每天练为了提高你的英语，你必须每天练习。习。8Later he left home to work in different cities.后来他离开家到不同的城市工后来他离开家到不同的城市工作。作。96作宾语补足语(1)后面能接带to的不定式作宾补的动词有：tell,ask,allow,want,wish,teach,w

4、arn,invite,like,encourage等。如：The teacher always encourages us to learn English well.老师经常鼓励我们好好学习英语。10(2)在使役动词let,make,have和感官动词see，hear,watch,notice,feel,find等后要用不带to的动词不定式作宾补。但是，当上述动词变为被动语态后，其后的不定式必须补上to。如：We often hear her sing.我们经常听见她唱歌。被动语态：She is often heard to sing.她常被听见唱歌。11知识延伸知识延伸“疑问词不定式”结构

5、动词不定式可以和疑问词what,which,when,where,how等连用，构成不定式短语，在句中作主语、宾语、表语、宾语补足语等。如：12 He doesnt know what to wear.他不知道要穿什么。(作宾语)Where to go has not been decided.要去哪里还未决定。(作主语)13提醒提醒 动词不定式的否定结构是：not to do sth。14（to）do用法用法不定式不定式主语主语 、宾语、宾语、定语定语 、表语、表语、状语、状语、宾语补足语宾语补足语15考点过关考点过关用所给词的适当形式填空用所给词的适当形式填空 1Its very nice

6、 of you _ (help)me.2We decided _(visit)the Great Wall.to helpto visit主语主语宾语宾语16 4.The problem is （find）a solution.5.That will be the only thing （do）now.6.We jumped with joy （hear）the news.to findto doto hear表语表语定语定语状语状语177.They encouraged her （try）again.8.I heard her （sing）today She sang wonderfully

7、9.Do you know how （play）football?to trysingto play疑问词疑问词宾补宾补宾补宾补18真题回顾完成句子 57.每天读书是个好习惯。Its a good habit to every day.（陕西省 2012中考）read books19真题回顾短文填空 As time went by,people all over the world began to 69.about Bethany and her story.（陕西省 2012中考）know20真题回顾完形填空 You dont need to tell me 39 to do.39.A.h

8、ow B.what C.why D.whether （陕西省 2015中考）21真题回顾完成句子 59.请访问我们的网站，来购买特别的礼物。Please visit our website to .（陕西省（陕西省 2015中考）中考）buy special gifts22真题回顾完成句子 56.我想邀请他参加我们的俱乐部。I want to join our club.（陕西省 2016中考）to invite him23真题回顾短文填空One day just before the summer vacation,he came to 68 some art books.（陕西省 2016中考）borrow24Homework在课本中找出含有在课本中找出含有to do以以及及do的句子各五个，并注的句子各五个，并注明其在句中所起的作用。明其在句中所起的作用。2526