题目内容
8.Peter has to stay up late for his homework.(改为否定句)Peterdoesn't haveto stay up late for his homework.
分析 彼得不得不为了他的作业熬夜很晚.
彼得不用为了他的作业熬夜很晚.
解答 答案:doesn't have.原句has to 表示不得不,是一般现在时,它的否定式借助于助动词do/does,再加上not,主语Peter是第三人称单数,has还原成原形have,故答案是doesn't have.
点评 本题考查肯定句变否定句,做此类题时,需在句子相对应的助动词后加not,若动词为三单或过去时,动词需还原成原形.
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