题目内容
8.They do their homework in the evening.(改为否定句)Theydon'tdo their homework in the evening.
分析 他们晚上做作业.
他们晚上不做作业.
解答 答案:don't do.
句中do是实意动词,这里是一般现在时,主语they复数,故借助于助动词do构成否定,后加动词原形do,故答案是don't do.
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等.
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