✔ 最佳答案
SINCE
ad.(常用於現在完成式或過去完成式)
1. 此後;從那時到現在
She left school three years ago and has worked as a nurse ever since.
她三年前畢業,從那時起便一直當護士。
2. 之前,以前
prep.
1. (常用於現在完成式或過去完成式)自...以來,從...至今
I haven't heard from him since last year.
我自去年以來未曾收到過他的信。
conj.
1. (常用於現在完成式或過去完成式)自...以來,從...至今
It's been ten years since they married.
他們結婚到現在已經十年了。
She has been living a hard life since her husband died.
自從丈夫死後,她一直過著艱苦的生活。
2. 既然;因為,由於
He must have taken the book since it isn't here.
他一定是把書拿走了,因為書已不在這裡了。
Since it is so hot, let's go swimming.
既然天氣這麼熱,我們去游泳吧。
2007-06-25 13:26:13 補充:
I hope I can help you!