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时间:2020-04-05
《高考语法——助动词.ppt》由会员上传分享,免费在线阅读,更多相关内容在PPT专区-天天文库。
1、助动词助动词一般没有词意,不能单独作谓语动词。其作用是帮助构成各种时态、语态、否定、疑问等。1、助动词be(am,is,are,was,were,being,been)的用法(1)be后跟现在分词构成进行时态Whoisplayingtheviolin?Shewasreadingabookthen.(2)be后跟过去分词构成被动语态Hewasaskedtodothework.Youareinvitedtoattendthemeetintg.(3)be后跟不定式作谓语,有如下几种情况①表示计划、安排将要发生的事。Whoarewetomeet?I'mtohaves
2、upperwithJohnthisafternoon.②表示指示、命令,否定式表禁止。Youaretoseetheheadmastertoday.Youarenottoentertheroomwithoutpermission.③表示义务、责任等,同shouldYouaretobebackbefore5.Whatistobedone?该干什么。④表示可能性,与情态动词may,can同义Suchbooksaretobefoundinanylibrary.Notasoundwastobeheard.一点声响也没有。⑤表示后来发生的事,可以用来表示命运或注定The
3、ysaygood-bye,littleknowingthattheywerenevertomeetagain.Hewastoregretthedecision.⑥用于习语WhereamItogo?WhatamItodo?2、助动词have(has,had,having)的用法(1)助动词have可以构成完成时或完成进行时Hehasbeenadoctorfor10years.ThisistheplaceIhavebeenlongingtovisit.(2)和不定式构成谓语,表示客观上不得不做的事情We'vemissedthetrain.We'llhavetow
4、aitforanotherone.-Dowehavetostartwork?-No.Wedon'thaveto.3、do(does,did)的用法(1)构成疑问句或否定句Howdidyouknowaboutit?Hedoesnotsmoke.(2)加强语气。Hedidtellthat.Docomeandseeus.(3)代替前面刚出现的动词,避免重复-Youlikepopularmusic,don'tyou?-Yes,Ido.HespeaksFrenchasfluentlyasshedoes.(4)用于倒装句中Neverdidhepayattentionto
5、mywords.OnlythendidIunderstandtheimportanceofEnglish.(5)构成否定的祈使句Don'tbesocareless.Donothesitatetocomeforhelp.4、shall(should)和will(would)的用法(1)shall(should)用于第一人称的将来时中,单纯表示将来WhenshallIseeyouagain?Ishallthinkitover.IranguptotellherthatIshouldleaveforLondon.(2)will用于第二、第三人称的将来时态中,在现代英
6、语中可以用于所有人称Hewillbe30nextmonth.YouwillhaveanEnglishtesttomorrow.Hewantedtoknowwhenyouwouldfinishthewriting.
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