when the chance has came ,we should how to do

when the chance has came ,we should how to do
when the chance has came ,we should how to do

when the chance has came ,we should how to do
病句!
如果想表达“当机会来的时候 我们该怎么做?” ,应该说——When the chance comes,what should we do?或者How to do it when the chance comes?

当机会来的时候 我们该怎么做

当机会有时来了，我们应该如何做

when the chance has come, we should know how to do.
当机会来临, 我们应该知道怎样做.