题目内容
3.My mother has a pet.(改为否定句)My motherdoesn't havea pet.
分析 --我的妈妈有一个宠物.
--我的妈妈没有一个宠物.
解答 答案:doesn't have.考查否定句.根据has第三人称单数.可知应该是一般现在时态,主语是mother单数,含有实义动词,变否定句在实义动词前加doesn't,实义动词has变为原形have.答案是doesn't have.
点评 考查否定句.通常是在be动词,情态动词后加not.一般现在时态,主语不是第三人称单数用don't,主语是第三人称单数用doesn't.一般过去时态用didn't.还有其它用法需要牢记.
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