I thought someone came into the bedroom, but it was just a dream.

我还以为有人进了卧室，结果只是一场梦。

《牛津词典》

He thought I was a ghost or a dream and I thought perhaps he was.

他以为我是鬼或者是梦，我以为他也许也是。

youdao

For a minute, I thought you might be a dream too.

有那么一会，我还以为你也是个梦中的人呢。

youdao

William Russell thought his dream of a hybrid boat-plane was finally taking off as he saw his Flarecraft rise above Long Island Sound one recent morning.

FORBES: A Wing and a Prayer

This is it, I thought, 200 mph--a dream I've had since I was a kid.

FORBES: One Lamborghini, One Man, 200 MPH

Among those who thought all this sounds like a Internet-broker's dream was Mark Duff, a former manager with Dow Jones.

ECONOMIST: Online trading in Asia