放工的英文：
to quit work; to knock off; to get off

参考例句：

I like go home as soon as possible after work.
放工后我喜欢尽快回家。

quit是什么意思：
v. 离开，辞职，停止；辞（职）

She is poor but quite respectable.
她虽穷，人品却很端正。

There had been quite a metamorphosis.
他们完全变了样。

On the face of it, it seems quite reasonable.
从表面看，这似乎很合理。

work是什么意思：
n. 工作；职业；工厂；工作地点；产品；功；操作；作品；工程
v.（使）工作；操作；运作；起作用；使缓慢前进；经营

the works of a clock
钟的活动部件

conscientious work
本着良心做的工作

The work is not advancing.
工作没有进展。

knock是什么意思：
n. 爆震声；敲；敲打
v. 敲；打；击；批评；撞；（心）怦怦跳

Who is knocking the door || Who is knocking || Who is at the door || Who is knocking at the door?
谁在敲门

Who is knocking the door / Who is knocking / Who is at the door / Who is knocking at the door?
谁在敲门

Please knock double knocks at the door before entering.
请先敲两下门再进来。