首先,“since”表示“自从…起,直到现在”,”since”后面一般用过去式句子或单词,词组,前面用完成时态:
I’ve never been to a movie since I came to Guangzhou.
我自从到了广州,就没去看过一场电影。
I’ve been teaching English since I graduated from college.
我自从大学毕业后,一直教英语。
We’ve been very close since we met each other 2 years ago.
我们自从两年前认识后,一直是很要好的朋友。
She hasn’t worked since her marriage.
她结婚后,未曾去工作过。
Ever since 表示从那时到现在,此后一直:
He went to London in 1979, and has lived there ever since.
他1979年去了伦敦,从此之后,一直住在那。
“since”的第二种用法,表示原因,“由于,因为,鉴于”,用在稍正式的场合:
The hiking is cancelled since it’s raining cats and dogs.
徒步旅行被取消了,因为下着倾盆大雨。
Since we have no money, we can’t afford it for the time being.
我们没钱,所以暂时买不起。
I can’t go to your class since I am ill.
我不能去上你的课,因为我病了。
“for”也可以引导原因,用在稍口语化的场合:
I can’t let you do it for it’s gonna damage your reputation.
我不能让你这么做,因为这会毁了你的名声。
They call for a meeting for there’s something urgent to discuss right now.
他们要求立即开一个会议,因为发生了紧急的事需要讨论。
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