since[sins]

• adv.
  • 此后，自那以后；后来
  • 之前，以前
• prep.
  • 从…至今：

    There have been many changes since the war.

    从战争到现在发生了许多变化。

  • 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.
  • 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。

  • [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。

  • 因为；既然：

    Since this is so,it's better to accept it.

    既来之，则安之。

• 短语:
  • ever since 自…以来；一直到今
  • long since 很久以前，早已
  • since when 自什么时候起，打什么时候开始