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The doctor looked over him carefully after he to the hospita

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The doctor looked over him carefully after he to the hospital.
The doctor looked over him carefully after he to the hospital.空格处我知道填写 was taken 但是为什么不用 过去完成时 填 had been taken
The doctor looked over him carefully after he to the hospita
after这个词用在句中时,如果主句是一般过去时,那么从句也用过去时态,如果主句是一般将来时态,那么从句用现在时态表示将来.语法就是这样的.过去完成时态是错误的.