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1、陈述句变否定句陈述句变否定句陈述句陈述句：是用来陈述一件事情或表示一种看法，可分为肯定句和否定句两种形式。一、变否定句：1.当谓语动词是 be 动词,am，is are 或者过去时 was,were 时，直接在这些词后面加not构成否定形式，即am not,is not=isnt,are not=arent。如果句子里有some，在否定句中要变成any.and变成 or.Eg.She is a beautiful girl.（改为否定句）She isnt a beautiful girl。There are some students in Sun school。(改为否定句)-There a
2、rent any students in Sun school.2.当句子中谓语动词是助动词will，情态动词can,could，should，must 等时，直接在助动词和情态动词后加 not 变为否定句.注意 will not=wont，can not=cant,must not=mustnt 表示禁止。如果句子里有 some，在否定句中要变成any。and 变成 or。Eg。My family will go to Beijing and Qingdao next Sunday。(改为否定句)1-My family will not go to Beijing or Qingdao ne
3、xt Sunday。They can run very fast。(改为否定句）They cantrun very fast。3.Eg.谓语动词是行为动词而又没有助动词或情态动词时,必须在谓语动词前加助动词，一般现在时加助动词 do，第三人称单数加 does，一般过去时加 did，再和 not 构成否定结构。dont，doesnt，didnt 后都用动词原形。如果句子里有 some,在否定句中要变成 any.and 变成 or.Eg Tom flies kites in the playground。（改为否定句）-Tom doesnt fly kites in the playground.
4、We often play football after class.（改为否定句)We dont often play football after class.练习练习1）Mike is a student at Sun school.（改为否定句)Mike _ a student at Sun school.2）There are some apple juice in the fridge。（改为否定句）There _ _ _ apple juice in the fridge。23）I am happy and excited to hear that good news。（改为否定
5、句)I am _ _ happy _ excited to hear that good news.4）She will go swimming next week.（改为否定句）She _ _ go swimming next week。5)My parents can cook meat with potatoes。（改为否定句)My parents _ _ cook meat with potatoes.6）You must do your homework now.（改为否定句）You _ do your home work now.7)Jill has lunch at school
6、 every day。(改为否定句)Jill _ _ lunch at school every day。8)The children had a good time at the party.(改为否定句)The children _ _ a good time at the party.9）Rose didnt watch TVthis morning.(改为肯定句）Rose _ _ this morning。10）She does exercises at home in the evening。（改成否定句、）3She _ _ exercises at home in the even
7、ing.11）He said something important at the meeting。（改为否定句)He _ _ _ important at the meeting.12）He reads English every morning。He _ _ English every morning。13)They can swim across the river.They _ _ swim across the river.14)I have some bread to eat。I _ _ _ bread to eat.15）They are playing basketball.They _ _ basketball.16)The teachers will go to a meeting tomorrow.The teachers _ _ go to a meeting tomorrow。4