since 因为,既然。引导的从句大多置于句首,主从句的时态一般相同。 Since you have no licence, you are not allowed to drive 因为你没有驾驶执照,所以不允许你开车。 Since you are al here, let's try and reach a decision 既然大家都来了,咱们就设法做出一个决定吧。C.as as 由于。一般多用于句首。 As she was ill, she didn't come to the party 由于病了,她没来参加晚会。 As he was not well enough, I had to go without him 由于他身体欠佳,我只好不带他去了。 As it rained, we all stayed at home 由于下雨我们都呆在家里。
C. because, since, as 的区别
1.because语气最强,表达的是未知的新信息,一般置于主句之后,也可以放在主句之前,用逗号隔开。在回答why引导的特殊疑问句时,或在 强调结构It iswas �that 和关联词not �but 引导的原因状语从句中,要用because。另外,because还常和副词just, merely等连用。 2.since 往往表示的是已知的客观事实,或分析后的推理,引导的从句大多置于句首,主从句的时态一般相同。 3.as 表示的理由最弱,只是对主句的附带说明,重点在主句。as从句通常放在主句前。 Just because he doesn't complain, you must not suppose that he is satisfied 你不可只因他不抱怨就以为他满足了。 You shouldn't get angry only because some people speak ill of you 你不该仅仅因为有些人说了你的坏话就生气。 Since you're not interested, Iwon't tell you about it 既然你不感兴趣,那我就不告诉你了。 As you are unable to answer perhaps we should ask someone else 因为你不能回答,也许我们该问一问别的人。 注意: because等词不能与 so连用。 【误】Because he was careless, so he failed in the exam 【正】Because he was careless, he failed in the exa 由于他粗心,所以他考试不及格。 【正】He was careless, so he failed in the exam 由于他粗心,所以他考试不及格。E.now that now that
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