题目内容
7.They have already finished the work.(否定句)Theyhaven'tfinishedthe workyet.
分析 haven't finished,yet
解答 答案:haven't finished,yet
原句用的是现在完成时,其中have本身是助动词,所以变否定句在have后面直接加not,另外注意already通常用在肯定句中,否定句和疑问句中一般用yet,故答案是 haven't finished,yet.
点评 含有be动词,情态动词或者助动词have/has的句子转化成否定时在其后面加上not,一般实意动词的否定式,通常应根据不同时态和人称在实意动词之前加don't,doesn't,didn't.
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