1. go on 继续；过去；继续下去；发生

eg While this conversation was going on, I was listening with earnest attention.

该谈话进行时，我在聚精会神地听。

2. Don’t play the fool. 别傻了

3. ought to 应该

eg I think I ought to cut in on what they are doing.

我认为对他们现在干的事我应当进行干预。

4. in front of

eg Waiting her chance, the girl nipped in front of an old woman.

瞅准机会，那个女孩很快插在了老太太的前面。