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| how long,how often和how soon用法辨析 | |
| 作者姓名： | 刘洪毓 |
| 摘 要： | how long,how often和how soon都有“多久”的含意,但实际上它们的意义和用法有较大的差别。how long用来询问谓语动词所表示的动作延续的时间长度有“多久”。它常与延续性动词的现在完成时连用,但有时也与延续性动词的一般将来时(或动词前有情态动词)、一般过去时或过去完成时连用。例如:1.—How long have you known her?—For about four years.2.—How long will it take you to finish the work?—Ten days.3.How long can you stay here?4.How long did your mother teach in the school?5.He asked me how long I had lived in … |
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