It is very expensive, I presume?

I presume the car was very expensive.

“Is he still on holiday?” “I presume so.”

Don’t presume to give me orders in my own house.

These species are presumed extinct.

The missing tourists are presumed dead.

He was presumed missing in action.

A person is presumed innocent until proven guilty.

He is listed as missing in action, and presumed to be dead.