肯定句转换成否定句.doc

《肯定句转换成否定句.doc》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、肯定句转换成否定句肯定句转换成否定句大概有以下三种情况：1、含有Be动词（am,is,are,was,were）的肯定句，变成否定句时，直接在Be动词后面加not构成否定。2、含有情态动词（can,could,may,might,should,must,need等）的肯定句，变成否定句时，一般在情态动词后面加not构成否定。3、除上述两种情况，肯定句转换成否定句一般通过添加助动词do/does/did，助动词后面再加not构成否定句，助动词后面的动词恢复原形。但如果肯定句时态是完成时，那么转换成否定句时，直接在have、had后面加not构成否定句。具体如下：情形一、含有Be动词的肯

2、定句IamfromEngland.→IamnotfromEngland.Heisaworker.→Heisnotaworker.＝Heisn’taworker.(isnot=isn’t)Theyaremycousins.→Theyarenotmycousins.＝Theyaren’tmycousins.(arenot=aren’t)Billwasathomelastnight.→Billwasnotathomelastnight.＝Billwasn’tathomelastnight.(wasnot=wasn’t)情形二、Ilikefruitsalad.→Idonotlikefruit

3、salad.＝Idon’tlikefruitsalad.(donot=don’t)Shelikesstrawberries.→Shedoesnotlikestrawberries.＝Shedoesn’tlikestrawberries.(doesnot=doesn’t)Wegotoschooltogether.→Wedonotgotoschooltogether.＝Wedon’tgotoschooltogether.MyfatherwenttoBeijinglastweek.→MyfatherdidnotgotoBeijinglastweek.＝Myfatherdidn’tgotoB

4、eijinglastweek.情形三、含有情态动词的肯定句Jackcanplaysoccer.→Jackcannotplaysoccer.＝Jackcan’tplaysoccer.(cannot=can’t)Hecanrunveryfast.→Hecannotrunveryfast.＝Hecan’trunveryfast.练习：1、Lilyismybestfriend.（改成否定句）______________________________________________2、Heworksonweekends.（改成否定句）_____________________________

5、_________________3、Mysisterstudiedathomeyesterdayevening.（改成否定句）______________________________________________4、Tomcanmakemodelplanes.（改成否定句）______________________________________________