不成

如果这个计划不成，我们还有第二套方案。

If this plan doesn't work, we have a backup plan.

这件事要是办不成，我怎么向大家交代？

If I can't get this done, how am I supposed to explain it to everyone?

光说不做是不成的，我们要动手去实践。

Just talking without acting won't do; we need to put things into practice.

现在出发去车站不成了，我们已经赶不上那班车了。

It's no use setting off for the station now; we've already missed that train.

天都这么黑了，你还要一个人出去不成？

It's already so dark. You aren't planning to go out alone, are you?

这点小事，难道你还害怕不成？

You're not afraid of such a small thing, are you?