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高中英语语法独立主格结构的时态问题
请问独立主格结构结构除了常见的4种,能否用sb having been doing?.(现在完成进行时)~请给出依据,
人气:304 ℃ 时间:2020-04-14 18:13:04
解答
肯定是可以的
It having been raining for several days,we had to cancel the trip to Beijing.
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