The school site was once used as a military base.

And since then they've been using it as a base.

This was used by him as a base for his political career.

Eventually, she was given a small office at the hospital to use as a base.

I would suggest using one place as a base for the three days.

But you can avoid this by using one town as a base for a few days.

If you don't already have an idea, consider which of your skills could be used as a base for starting a business.

We use theater as a base to open up to those issues.

He does not have to use one of the big islands as his base.

It is used as a base for a number of actions.