A sudden change in the air made her look up.

Then with another sudden change of voice she went on.

He was still trying to figure out the sudden change in her behavior.

After she left I sat thinking about her sudden change of heart.

This was not a sudden change, but took place over a long period.

It was not long before a sudden change came over the man.

He's had a sudden change of heart on that matter we were talking about.

Everything around their happy life takes a sudden change from that point.

Why this sudden change should have come about we do not know.

There was a sudden change in air pressure around her.