资源描述：
《变否定句方法.doc》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、变否定句方法1．Be(一般现在时is/are/am一般过去时was/were),在be后面加not.缩写：isn’taren’twasn’tweren’t1).Sheisathomenow.→Sheisnotathomenow.=isn’t2)Theyareplayingbasketball.→Theyarenotplayingbasketball.=aren’t3)Iamateacher.→Iamnotateacher.4)Hewasasleep.→Hewasnotasleep.=wasn’t5)Wewerehappyattheparty→Wewerenothappy
2、attheparty.weren’t2.在情态动词can,could,must,should,may,will,would,shall等后面加not。缩写：can’t,couldn’t,mustn’t,shouldn’t,maynot,won’t,wouldn’t,shalln’t1）Hecanswimintheriver.→Hecannotswimintheriver.2）Weshouldcleantheroom.→Weshouldnotcleantheroom.3）He can read and write．→He can’t read orwrite． 3.谓语动
3、词是行为动词时，在该动词前加上don’t ／doesn’t／didn’t，动词用动词原形。如：1）He gets up early．→He doesn’t get up early．2）Theygotoschoolonfoot→Theydon’tgotoschoolonfoot.3）ShesawLiuXiangyesterday.→Shedidn’tseeLiuXiangyesterday.He/she/it/Lucy/LiLei当主语是第三人称单数时，用doesn’tThey/we/you/myparents/I当主语是复数和第一人称I时，用don’t当He/she/
4、it/Lucy/LiLei/They/we/you/myparents/I过去时都用didn’t4.用含否定意义的词或词组取代肯定句中的某些词或词组。如： I know both English and Chinese．→I know neither English nor Chinese． 类似的有：ever /always→neversomebody→anybodytoo→eithersomething→anything everybody→ no onealmost →hardly already→yetoften→seldomNeither…nor→Both..
5、.and5．祈使句的肯定式变否定式 （1）一般在动词前加上 don’t。如： Open the window ．→Don’t open the window． （2）含有“Let’s．．．”的祈使句，一般用“Let’snot……”Let’s go there．→Let’s not go there．6．复合句的肯定句变否定句方法一般将主句变为否定式。如：I saw her when I left ．→I didn’t see her when I left． 7.例题1).Ithinksheisthere.→Idon’tthinksheisthere分析：宾语从句前面的
6、动词是think,believe,expect,suppose。变否定句时,即否定主句谓语，不否定宾语从句谓语。2).Hecansingthissongandthatone.Hecannotsingthissongorthatone.3).Tomwenttoschool,too.Tomdidn’tgotoschool,either.4).Hehashadsupperalready.Hehasn’thadsupperyet.助动词has/have/had（not）+过去分词5).Hehadagoodrestjustnow.Hedidn’thaveagoodrestjust
7、now.分析：has/have/had表示开会、吃饭、休息、进行体育锻炼是行为动词，2变否定句时，借用助动词doesn’t/don’t/didn’t,后面再接动词原形。6).Let’sdoit.→Let’snotdoit.7).Healwaysgetsthereontime.→Henevergetsthereontime. 8).Itoftenrainshere.→Itseldomrainshere.9).Behereearlytomorrow.→Don’tbehereearlytomorrow.10).Youhadbettercome.
