3.work out 意為“得出（結果、總數(shù)等）”。如：
This math problem is too difficult. I can ’ t work it out. 這道數(shù)學題太難，我算不出來。
4.run out of 意為“用光；耗盡”。如：
It is very important that this organization does not run out of money. 這個組織沒有用光錢，這是很重要的。
5.go out 意為“出去；熄滅”。如：
What about going out for a walk ？ 出去散步怎么樣？
I was doing my homework when the lights went out. 我正在做家庭作業(yè)時，燈突然滅了。
6.find out 意為“查明；弄清”。如：
We must find out who broke the window. 我們必須查明是誰打碎了窗戶。