.
从…至今: There have been many changes since the war. 从战争到现在发生了许多变化。
2.
自从…,自…算来,自…以来: It has been raining since morning. 从早晨到现在一直在下雨。 conj.
1.
以后,在…以后的时间里: She has rung me once since she left. 她离家后给我来过一次电话。
2.
[常前接 ever] 自…以来,自…至今: I've been busy ever since I came back. 自我回来后一直在忙。
3.
因为;既然: Since this is so,it's better to accept it. 既来之,则安之。