问题描述：
1.start doing sth /start to do sth. 意思上完全一样吧?
2.Hardly had the game begun when it started raining.
这句, when it started raining. 的时态是什么?
2.Hardly had the game begun when it started raining.
这句, when it started raining. 的时态是什么?
问题解答：
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