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2012中考英语冲刺必备知识 23

比较since和for Since 用来说明动作起始时间,for用来说明动作延续时间长度。 例如: I have lived here for more than twenty years. 我住在这儿二十多年了。 I have lived here since I was born. 我从出生起就住在这儿了。 注意:并非有for 作为时间状语的句子都用现在完成时。 I worked here for more than twenty years. (我现在已不在这里工作。...

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