It's been building up to one for the last few weeks.

That has been particularly true since last month, with the build up for the summer movie season.

Because the deficit now has been building up for 12 years.

Build it up for a few days, while we try to find out where he is.

"No way you can build him up for it first?"

These guys have been building up to something for a while.

This is what I have been building up to for my entire life.

The condition has been building up for a long time.

"This situation had been building up for quite a while," he said.

How long had this been building up for her to break down so soon in front of me?