用before连接:He opend the window?He closed the door first?(before)这句话中前半部是什么时态后半部又是什么时态:I had made an appointment before I went see the dentist.
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![用before连接:He opend the window?He closed the door first?(before)这句话中前半部是什么时态后半部又是什么时态:I had made an appointment before I went see the dentist.](/uploads/image/z/13512136-40-6.jpg?t=%E7%94%A8before%E8%BF%9E%E6%8E%A5%EF%BC%9AHe+opend+the+window%3FHe+closed+the+door+first%3F%28before%29%E8%BF%99%E5%8F%A5%E8%AF%9D%E4%B8%AD%E5%89%8D%E5%8D%8A%E9%83%A8%E6%98%AF%E4%BB%80%E4%B9%88%E6%97%B6%E6%80%81%E5%90%8E%E5%8D%8A%E9%83%A8%E5%8F%88%E6%98%AF%E4%BB%80%E4%B9%88%E6%97%B6%E6%80%81%EF%BC%9AI+had+made+an+appointment+before+I+went+see+the+dentist.)
用before连接:He opend the window?He closed the door first?(before)这句话中前半部是什么时态后半部又是什么时态:I had made an appointment before I went see the dentist.
用before连接:He opend the window?He closed the door first?(before)
这句话中前半部是什么时态后半部又是什么时态:I had made an appointment before I went see the dentist.
用before连接:He opend the window?He closed the door first?(before)这句话中前半部是什么时态后半部又是什么时态:I had made an appointment before I went see the dentist.
he had closed the door before he opened the window,
一样都是:前半部过去的过去,所以用过去完成时,后面是一般过去时
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before是连词,连接的两个句子时态是一致的。He closed the door before opened the window.
第二句中,前半句是过去完成时,后半句是过去时。
he closed the door before he opened the window.
前半部分是过去完成时,表示过去的过去;后半部分是一般过去时,表示过去。因为预约在看牙医之前发生,而“看牙医”这个动作已经发生在过去,所以“预约”这个动作发生在过去的过去,因此用过去完成时表示。
He had closed the door before he opened the window....
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前半部分是过去完成时,表示过去的过去;后半部分是一般过去时,表示过去。因为预约在看牙医之前发生,而“看牙医”这个动作已经发生在过去,所以“预约”这个动作发生在过去的过去,因此用过去完成时表示。
He had closed the door before he opened the window.
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