There are many people downstairs .what do you think _____(happen).

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There are many people downstairs .what do you think _____(happen).

There are many people downstairs .what do you think _____(happen).
There are many people downstairs .what do you think _____(happen).

There are many people downstairs .what do you think _____(happen).
happened
what happened?发生了什么事
难道是 is happening?

has happened
应该用现在完成时,强调对现在的影响“楼下聚集了很多人”可答案不是这个。那就是 is happening 或者will happen 再有就是错的。 可以说,这个选择题不会有has happened这个选项,有的话,最好选这个,道理我讲了。 表正在发生,go on 用的多些 如: 你知道那儿发生什么事了吗? What do you think is go...

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has happened
应该用现在完成时,强调对现在的影响“楼下聚集了很多人”

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do you think 在这里就是插入语,不做任何成分。

答案是has happened 因为do you think 是插入语,去掉以后就可以看出句中缺谓语,happen是不及物动词,不能用被动语态。补充回答: to happen和happening都是非谓语动词,因此不能做谓语。