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一：for + 时间段;since + 时间点 They have lived in Beijing for five years. They have lived in Beijing since 1995. I have learned English for ten years. 二：常见的不确定的时间状语：lately; recently, just, already, yet, up to now; till now; so far, these days, Has it stopped raining yet ? 三：在表示“最近几世纪/ 年/ 月以来……”时间状语中，谓语动词用现在完成时。 in the past few years/months/weeks/days;over the past few years; during the last three months; for the last few centuries, through centuries; throughout history 等 四：表示“第几次做某事，”或在 “It is the best (worst, most interesting ) +名词 +that” 后面跟现在完成时。 This is my first time that I have visited China. This is the most interesting film I have ever seen. That is the only book that he has written. (责任编辑：admin) |