Grammar
-다고 생각하다
think that
Form
Declarative clause + -다고 생각하다 (variants -ㄴ/는다고, -(이)라고) — “think that”.
Function
Reports a proposition as the content of a thought; the quotative form changes by predicate type.
Why this form?
-(으)ㄴ/는 것 같다 — “it seems that” conveys an impression or inference rather than a definite thought.
How to build it
Descriptive adjective: A-다고 생각하다; present action verb: V-ㄴ/는다고 생각하다; noun + 이다: N-(이)라고 생각하다; past: -았/었다고 생각하다.
Forms not to confuse
-(으)ㄴ/는 것 같다
좀 이상한 것 같아요. — It seems a little odd.
Examples
저거 좀 이상하다고 생각하는 사람 없어요? — Does nobody think that's a little strange?
그게 옳다고 생각해요. — I think that's right.