英语only after the earthquake happened why a smelly gas came out ofonly after the earthquake happened _______ why a smelly gas came out of the cracks in the well walls.A.did people know B.have people knownB为什么不行?

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英语only after the earthquake happened why a smelly gas came out ofonly after the earthquake happened _______ why a smelly gas came out of the cracks in the well walls.A.did people know B.have people knownB为什么不行?
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英语only after the earthquake happened why a smelly gas came out ofonly after the earthquake happened _______ why a smelly gas came out of the cracks in the well walls.A.did people know B.have people knownB为什么不行?
英语only after the earthquake happened why a smelly gas came out of
only after the earthquake happened _______ why a smelly gas came out of the cracks in the well walls.
A.did people know B.have people known
B为什么不行?

英语only after the earthquake happened why a smelly gas came out ofonly after the earthquake happened _______ why a smelly gas came out of the cracks in the well walls.A.did people know B.have people knownB为什么不行?
only+时间状语引起的倒装句用部分倒装,你的问题要看句子的时态,句子不倒装的话是：people_____(know){why a smelly gas came out of the cracks in the well walls }only after the earthquake happened.通过after这个词我可以知道,动作（people）know发生在动作（earthquake）happen之后,原句中happen动作发生在过去,在时间轴上,{过去}之后还不到{现在}仍属于过去,因此know的时态必定属于过去范畴,肯定不能用现在完成时.
告诉你个诀窍哦,有些复杂的句子,动作多了时态确实不好判断,这个时候你可以画一条时间轴,标上{过去}、{现在}、{将来},通过已知的时态和一些连接词像before,since,for,after什么的就容易判断时态了,

B是现在完成时,运到在一般现在时的完成状态,
首先这句话是虚拟语气,要用过去时,同时only after引导时间状语从句，条件句使用过去时

根据语境是“地震发生后人们才知道...”而B答案有“人们已经知道”的意思，所以A

因为when引导的时间状语不能用现在完成时中,所以,这题用倒装的结构A.

因为 after the earthquake happened是表示过去的时间状语 绝对不能和现在完成时连用 所以 答案是 A.did people know 不是 B.have people known
如果是 only since the earthquake happened那么答案就是 B.have people known

ear no one only the strong This is a very strange thing which happened only yesterday.In the morning,Mrs.Green got up very ear续写这个故事,用英语哈 Friends of the Earth look after the environment.Friends of the Ear 求英语大神修改句子.Only after the war he learned the sad news. 改英语同义句:They only konw each other after they enter the house. The library is open only after school. ear英语怎么读 英语选择题There are only seven days____ the Dragon Boat festival.A.before B.after C.until I realize the value only after I lose it. Only this after did I finish the novel. Colour the ear purple.翻译 带有ear的英语,越多越好 ear|y的反义词 英语 after the earthquake 英语作文 英语作文After the Exam ear 英文翻译 the deluge after sb.Her only goal is high;life seems the deluge after her. 这句英语谚语是什么意思The old man smiles from ear to ear.不仅要表面的中文意思,也要深一层的意思.