since表因为时。。。。
since表因为时,在句子中,前面是不是一定要有逗号,还是可以像连词一样直接连接前面句子??
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。
since表因为时,在句子中,前面不要有逗号,放在句首时,从句部分最后加逗号 1.Since you ask, I will tell you. 你既然问,我就告诉你。 2."Since many of the customers work during the day, Billy has to collect the money at night." "因为许多顾客白天上班,所以毕利只好晚上去收钱。"
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