题目内容
20.Laura has an English-Chinese dictionary.(改为否定句)Lauradoesn'thavean English-Chinese dictionary.
分析 劳拉有一本英汉字典.
劳拉没有一本英汉字典.
解答 答案:doesn't have.这里是一般现在时,has是have的三单,have是实意动词"有",改为否定句需借助于助动词do或者does,加上not,主语是Laura三单,故用does not,缩写doesn't,后加动词原形have,故答案是doesn'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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