since

介系词

1. 1

   自…以来、从…开始

   She has lived in this city since 2015.

   她从二○一五年起就住在这座城市。

连接词

1. 1

   自从、自…以来

   I haven't seen him since we graduated from college.

   自从我们大学毕业后，我就没再见过他。

2. 2

   既然、因为、由于

   Since you're already here, you might as well help.

   既然你都来了，不如就帮个忙。

副词

1. 1

   从那时以来、之后

   He left home at eighteen and has not returned since.

   他十八岁离家，之后就没再回来过。

2. 2

   早已、久已多与 long 连用

   The old bookstore has long since closed down.

   那家老书店早就已经关门了。

相关片语

• best thing since sliced bread
• long since