since
01
自从, 自...以来
used to express a period from a specific past time up to now or another specified point
例子
I've felt better since I've been here.
我来到这里之后感觉好多了。
例子
I have been feeling much better ever since I started exercising regularly.
自从我开始定期锻炼以来,我感觉好多了。
例子
I didn't eat dessert since I'm on a diet.
我没有吃甜点,因为我在节食。
since
01
自那时起, 从那时起
from a specific point in the past until the present time
语法信息
时间副词
例子
He started studying medicine in 2005 and has been practicing as a doctor since.
他于2005年开始学医,自那时起一直从事医生工作。
例子
The settlement had vanished long since.
定居点早已 自 消失。



























