我预先作了准备。
I had made preparations beforehand.

他预先提醒过我这件事。
He warned me beforehand what to expect.

所有的座位都可以预订。
All seats are bookable in advance.

租金须预付。
The rent must be paid in advance.

请把行李预先送出。
Send your luggage on in advance.

你若预先通知我，我就能给您准备好了。
If you warn me in advance, I will have your order ready for you.

预知未来发生的事是不可能的。
It's impossible to know in advance what will happen.

只要你预先付款，我们就不收你送货费。
As long as you've paid in advance we won't charge you for delivery.