题目内容
16.She studied for a test yesterday.(改为否定句)Shedidn'tstudy for a test yesterday.
分析 他昨天为了考试而学习.
他昨天没有为考试学习.
解答 答案:din't study.原句是一般过去时,故借助于助动词did构成一般疑问句,后加原形study,故答案是din't study.
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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