Laura quickly realized the subjects of the conversation had changed from Crystal's friends to her parents.

When I asked him what kind of projects, he just said short films, changed the subject.

I might have gone on saying it for days if Ji hadn't changed the subject.

When he began speaking again, the subject had changed.

He paused for several moments, then changed abruptly the subject.

The subject has changed from seascape to art, and in this context it takes some getting used to.

Time to add stress to the experimental system and observe how the subjects changed.

Unless of course the subject has changed their mind about what the quote says between writing the book and doing the interview.

By now, the subject of the discussions had changed.

His subjects changed their view of him when events began to unfold.