Because of the bad weather,many of Europe's airports have shut and passengers had to stay in congested airspace.
由于天气问题,许多欧洲机场关闭,旅客不得不滞留在拥挤的空间.
请问这个句子中的时态,为什么前面是现在完成时have shut,而后面是一般过去式had to stay,
人气：466 ℃ 时间：2019-08-22 03:34:53
解答
现在完成时,have done,表示完成,had to,have to的过去式,前面是由于许多欧洲机场关闭,所以旅客不得不滞留在拥挤的空间,have shut 的时间发生在stay前,所以为什么前面是现在完成时have shut,而后面是一般过去式had to stay
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