题目内容
14.He often did his housework at weekends when he was a child.(改成否定句)Hedidn't oftendo his housework at weekends when he was a child.
分析 他小时候周末经常做家务.
他小时候周末不经常做家务.
解答 答案:didn't,do 含有行为动词的句子变否定句要借助于助动词,并在助动词后加not构成否定形式,再加上行为动词原形.此题中的行为动词did是过去式,要借助于助动词的过去式did,加上not,did和not可以缩写为didn't;再加上行为动词did的原形do即可得出此题的答案.
点评 考查对含有行为动词的句子变否定句知识点的掌握.
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