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4.I do my homework after supper.(改为否定句)
Idon't do my homework after supper.

分析 我晚饭后做作业.
我晚饭后不做作业.

解答 答案:don't do.这里是一般现在时,do是实意动词,主语I,借助于do构成否定,后加动词原形,故答案是don't do.

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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