1 stoped 表示与事实相反的假设,需用过去时.
2 may break 表示未发生的假设,用情态动词.
3 was watching 表示正在发生,过去进行时.
4 to say had to 固定搭配 mean to do sth,打算做某事, 后边的是过去时.
5 asked 表被动,为省略句,完整句应为：when he was asked he ...
1 stoped 表示与事实相反的假设,需用过去时.
2 may break 表示未发生的假设,用情态动词.
3 was watching 表示正在发生,过去进行时.
4 to say had to 固定搭配 mean to do sth,打算做某事, 后边的是过去时.
5 asked 表被动,为省略句,完整句应为：when he was asked he ...