We are sorry for not answering your letter sooner.

When do you need it? The sooner, the better.

It is too early for the event. Can you give me a later date?

See you later.

I met her again three years later.

sooner or later

Sooner or later you will have to make a decision.

I'm confident that, sooner or later, you will achieve your dreams if you keep working hard.

The criminal will be punished sooner or later.

You're going to have to take the test sooner or later.

not/no later than…

Please arrive no later than 8 o'clock.

Assoon as /as soon as possible 

We'll send you the goods as soon as we can.

Please finish your homework as soon as possible.

The sooner, thebetter

There will be awar, sooner or later.

They know theyhave to leave the town, and the sooner the better.

He dreams ofliving in a big house. The bigger, the better.

 Friendship is like wine—the older thebetter.

Whenshall we set off (start our journey) tomorrow?

Theearlier, the better.