if and when
01
如果以及当
used to indicate that if certain conditions or situations occur, certain actions or responses will follow
例子
We 'll address the issue if and when it becomes necessary.
我们会在如果和当有必要时解决这个问题。
If and when you finish your homework, you can go out and play.
如果和当你完成作业时，你可以出去玩。
