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¶å®ææ¶æå¯ä¸è¡¨ç¤º"段æ¶é´"çç¶è¯è¿ç¨ã表示"段æ¶é´"ççè¯æï¼for two years, during the past three years, since last year, how longçãå¦ï¼I have learned English since I came here.èªä»ææ¥å°è¿å¿å°±å¦è±è¯äºã
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-When did you get to know Jack?
-Two years ago.
-Then you've known each other for more than two years.
-That's right.
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误ï¼He has died for three years.
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误ï¼He has come here for five days.
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æ£ï¼Five days has passed since he came here.
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He hasn't left here since 1986.
I haven't heard from my father for two weeks.
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Please look after my daughter while/when we are away. (be away为延ç»æ§å¨è¯çè¯)
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æ£ï¼How long have you been here?
æ£ï¼When did you come here?
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