题目内容
20.The little boy is watching TV at home.(改为否定句)The little boyisn'twatchingTV at home.
分析 小男孩正在家里看电视.
小男孩现在不在家看电视.
解答 答案:isn't watching.原句是现在进行时,其否定句是在be动词后加上not,故is后加上not缩写成isn't,故答案是isn't watching.
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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