英语辨析：since和for的用法
当特指某一段有始有终的时间时，我们使用'for'。
比如五年前(five years ago)或三个月前(three months ago)。
I do yoga for half an hour every day. (我每天做半个小时的瑜伽。)
I had this dress for five years. (我已有这条裙子五年了。)
'for'可与所有时态使用搭配。
时间的好“基友”：since和for
当提到某件事情的起始点并延续至今时，我们常用词语'since'。
I have had this dress since 2011. (我从2011年开始有这条裙子了。)
Mark has been here since 3.30pm. (马克下午三点半就到这里了。)
My parents have lived here since 1993.(我父母打1993年起就住在这里了。)
'since'与完成时态搭配使用。
He has been travelling since he finished university. (他毕业之后一直在旅行。)
Amanda had lived in Melbourne since her childhood.(阿曼达从小就住在墨尔本。)
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