He had finished his homework before he watched TV

He had finished his homework before he watched TV
对划线部分提问 划线部分为before he watched TV
____ ____ ____ ____ his homework?
四个空格
可以用when吗
我记得现在完成时是用how soon提问的...
英语人气:943 ℃时间:2019-11-20 06:24:18
优质解答
When did he finish
用how soon 提问的是将来的一段时间
这里问的是时间的点
我来回答
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