Then, sir, consider that for a long time our astronomers have believed that two general classes of planetary bodies existed.
Our astronomers used to think there were two classes.
Our astronomers have always believed there are only two classes.
Just say whatever you want, I don't care.
The boy is wearing red.
Three dogs are running through a field
It's fine the way it is, I don't need to do anything to it.
I cut up their card and mailed it to them.
The phone call ended.