题目内容
20.That is my dictionary.(改为否定句)That isn't my dictionary.
分析 那是我的字典.
那不是我的字典.
解答 答案:That isn't.句中含有be动词,否定句在后面加上not,故答案是That isn't.
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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