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1、一般疑问句和否定句的改法一、陈述句改为一般疑问句： 1.当句子中含有be动词(am is are was were)或情态动词(can, could, may, should等）时，把be动词或情态动词提到句首。 如：He is a docter.-Is he a docter? They were in the house yesterday.-Were they in? 另外，为符合实际习惯 I am/We are.-Are you? I was/We were-Were you.? I /We can-Can you.? 2.当句中含有实义动词时，也就是句子不含上面所提到那些be 动词或
2、情态动词时，必须在句首加DO/Does/Did,具体情况分以下三方面： 当句子中含有动词原型时，在句子前加Do, 其中，I + 动词。-Do you? 如：I like music.-Do you like music? They work here.-Do they work here? 当句子中含有的动词加S或es时，即句子是一般现在时，且主语为第三人称单数时，在句子前加Does.如： He likes music.-Does he like music? Tom comes from China.-Does Tom come from China? 当句子中的动词为过去式，在句子前加Di
3、d 再把动词变原型。如： I went to the park yesterday.-Did you go to the.? He played football this morning.-Did he play? 二、陈述句改为否定句： 1.当句子中含有be动词(am is are was were)或情态动词(can, could , should等），在be动词或情态动词后加not.如： He is a docter. -He is not a docter. They were in the house yesterday.-They were not in Tom can swim
4、.-Tom can not swim. 2.当句中含有实义动词时，也就是句子不含上面所提到的be动词或情态动词时，必须在原句动词前加dont,或doesn t或didnt： 当句子中含有动词 原型时，在动词前加dont： 如：I like music,-I dont like music. They go to school by bike.-They dont go to 当句子中含有的动词加s或es时，即句子是一般现在时，且主语为第三人称单数时，在句子中的动词前加doesn t，再把动词变原型: 如：He likes music.-He doesnt like music. Tom works here- Tom doesnt work here. 当句子中的动词为过去式，在动词前加didnt，再把动词变原型 如：I went to the park yesterday.-I didnt go to. He played football this morning -He didnt play football. 1
