both men genuinely regretted___ 1 their leave 2 to have to leave3 having to leave 4 they must have left选择哪一个,及为什么

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both men genuinely regretted___ 1 their leave 2 to have to leave3 having to leave 4 they must have left选择哪一个,及为什么

both men genuinely regretted___ 1 their leave 2 to have to leave3 having to leave 4 they must have left选择哪一个,及为什么
both men genuinely regretted___ 1 their leave 2 to have to leave
3 having to leave 4 they must have left
选择哪一个,及为什么

both men genuinely regretted___ 1 their leave 2 to have to leave3 having to leave 4 they must have left选择哪一个,及为什么
2 to have to leaveregret to do sth 后悔去做某事,还未做.
regret doing sth 后悔做过某事 做过了.

3 having to leave

真诚地对已经作过的事情表示抱歉

2 to have to leaveregret to do sth 后悔去做某事,还未做。
regret doing sth 后悔做过某事 做过了。

3 后悔已经做过的事情用动词的ing形式。
后面接to do则表示还没有做。