题目内容
18.The students have many exercises to do every day.(改为否定句.The studentsdon'thavemany exercises to do every day.
分析 学生每天要做许多锻炼.
学生每天不用做许多锻炼.
解答 答案:don't have.原句have是实意动词,是一般现在时,借助于助动词do或者does,主语是the students是复数,故借助于do加上not,后加动词原形have,故答案是don't have.
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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