Especially 'cause the old man had been unconscious for three months.

She may have been unconscious for an hour or two and then died.

She fell on her head and was unconscious for a long time.

He must have been unconscious for two weeks, at least!

He couldn't have been unconscious for more than a few minutes.

The man was not dead, but would remain unconscious for an hour.

Each time, I was unconscious for a few hours, and months went by here.

The doctor would only be unconscious for a short time, after all, and he had work to do before she came to.

He could not have been unconscious for more than a minute.

In any event he was unconscious for some period of time.