第1个回答 推荐于2016-09-01
since加时间点,时间点的时态应该是过去时,整句话应该是现在完成时。
例如:I have lived here since ten years ago.自从10年以前我就住在这里。
He has been in Beijing since 2000.自从2000年他就去北京了。
ten years ago 和2000 都属于过去的时间点。
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第2个回答 2013-01-01
一般过去时。如:I have lived in the city since I graduated from college.
第3个回答 2013-01-01
表时间点的从句用一般过去时。如果不是从句,那就是表过去某一时间的时间状语。
希望有帮助!
第4个回答 2013-01-01
since的用法:译作“自从…以来”
(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 months since he moved to this city. 要求:主句的谓v.用一般现在时或现在完成时;从句的谓v.用一般过去时,而且须是终止性动词。
(5)用于句型“一段时间 + has passed since + 时间状语从句”中,译作“自从…以来, …
(时间)已经过去了”。如上个例句还可写成:Three months has passed since he moved to this city. 要求:主句的谓v.用现在完成时,而且动词必须是has passed;从句的谓v.用一般过去时,而且须是终止性动词。
(6)注:当since用于否定句时,主句的谓v.可以是终止性动词。如 He hasn’t seen the film since last month.
(7)相关词组:“从那时起”:ever since、since then、from then on.
注:ever since作为一个词组,放句尾可单独使用。如I have given up smoking ever since. 另外,还可在since后接句子。since前加ever,只是加重语气而已。如 I have given up smoking ever since I caught a bad cough.
(8) since还可引导原因状语从句,译作“由于;因为”,相当于because。如 Since he was lazy, he didn’t finish his homework.