题目内容
5.John did his work yesterday afternoon.(改为否定句)Johndidn't do his work in the afternoon.
分析 --昨天下午约翰做他的工作.--昨天下午约翰没有做他的工作.
解答 答案:didn't do.句意"--昨天下午约翰做他的工作.--昨天下午约翰没有做他的工作."原句中的did是实意动词,变成否定句形式前边要加助动词do的过去形式didn't,因为助动词后接动词原形,把实意动词did变为原形do,即didn't do,所以答案是didn't do.
点评 做此题时要弄清do的词性既可以做助动词也可以做实意动词,要根据具体题意分析.
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