since的用法 since的八种用法详解


1、接时间点:如 I have stayed in that country since 1995.要求:谓v.用现在完成时,而且须是延续性动词.
2、接一段时间ago:如 They have lived in that house since two years ago.要求:谓v.用现在完成时,而且须是延续性动词.
3、接时间状语从句:如 I have loved her since I met her last time./ Lily has stayed at home since she left school.要求:主句的谓v.用现在完成时,而且须是延续性动词;从句的谓v.用一般过去时,而且须是终止性动词.
4、用于句型“It’s / It has been一段时间since时间状语从句”中,译作“自从…以来,已经…(时间)了”.如 It’s / has been three mo

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