你可以借我的车，条件是你把油箱加满。

You can borrow my car, ___provided you fill up the tank.

我们会继续执行这个计划，前提是每个人都同意。

We'll proceed with the plan, ___provided ___that everyone agrees.

这次旅行会很棒，只要天气保持晴朗。

The trip will be great, ___provided the weather holds.