题目内容
19.They flew up into the sky 2years ago.(改为一般疑问句)Did theyfly up into the sky 2years ago?
分析 他们两年前飞上过青天.
解答 61.Did; fly.
此句谓语动词为实义动词flew up to.改为一般疑问句时借助助动词did.助动词后动词要变为原形.
点评 熟悉一般疑问句变化规则.
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