题目内容
16.The grasshopper sat in the sun happily (改为否定句)The grasshopperdidn't sit in the sun happily.
分析 蚱蜢在太阳下开心的坐着.
解答 答案:didn't sit.原句是一般过去时,sat是实意动词sit的过去式,借助于did构成否定,后加原形sit,故答案是didn't sit.
点评 一、含有be动词(am/is/are/was/were)动词的一般疑问句,通常把be动词调到句首.
二、含有情态动词(can/may/must/could)的一般疑问句,把情态动词调到句首.
三、句子里没有be动词、助动词、情态动词等,就需要加助动词do,does,、did(过去式)来构成疑问句,加上这些助动词后,句子中谓语动词必须用原形.
其句型为:Do/Does/did+主语+动词原形+其它?
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