He knew about the change two weeks in advance. [=two weeks before the change occurred]他提前两个星期就知道了这个变化。

There was no way to know in advance [=ahead of time] that these problems would occur.不可能提前知道会出现这些问题。

We made reservations in advance.我们事先进行了预订。

You should call in advance to make an appointment.你应该事先打电话预约。

Thank you in advance for your help.提前感谢您的帮助。

They began to make preparations several days in advance of [=before, ahead of] her arrival.他们在她到达前几天就开始准备了。