と思う details
write + I think that
kaku to omou
I think that; in my opinion
この映画、君も気に入ると思うよ。
kono eiga, kimi mo ki ni iru to omou yo.
I think you'll like this movie too. casual
彼は自分のやり方が正しいと思っている。
kare wa jibun no yarikata ga tadashii to omotte iru.
He believes his way of doing things is right. neutral
- colloquial
- past
- polite
Examples
I think that — stating the speaker's own opinion or judgment
この映画、君も気に入ると思うよ。
kono eiga, kimi mo ki ni iru to omou yo.
I think you'll like this movie too. casual
値段の割りに品質はいいと思う。
nedan no wari ni hinshitsu wa ii to omou.
For the price, I think the quality is good. neutral
この計画には見直しが必要だと思います。
kono keikaku ni wa minaoshi ga hitsuyou da to omoimasu.
I believe this plan needs to be reconsidered. formal
believes; has been thinking — と思っている for opinions held over time, and the required choice when stating a third person's present belief
彼は自分のやり方が正しいと思っている。
kare wa jibun no yarikata ga tadashii to omotte iru.
He believes his way of doing things is right. neutral
いつか九州に住みたいと思っています。
itsuka kyuushuu ni sumitai to omotte imasu.
I've been thinking I'd like to live in Kyushu someday. neutral
Formation
{V}とおもうattaches to dictionary formplain clause + と思うattaches to plain clause
Variant notes
- って思う — quotative と relaxes to って in casual speech — 無理[むり]だって思[おも]った。
Notes
Related patterns
Similar
Both soften an assertion, but と思う signs it — the speaker owns the judgment and answers for it — while でしょう presents the same content as impersonal likelihood; opinion surveys collect と思います, weather forecasts run on でしょう.
Negative expectation at two strengths — ないと思う files a mild personal opinion ("I don't think so"), はずがない categorically excludes the possibility and implies the speaker has grounds for saying so.
Same quotative と over a finished plain clause — 言う puts the content in someone's mouth, 思う in the speaker's head; 来ると言っている reports their words and commits them, 来ると思う offers only the speaker's own guess.
Lookalikes
Both bolt onto a finished plain clause and report its content, but と思う sources the claim to the speaker's own head and そうだ to someone else's mouth — 来ると思う is an opinion, 来るそうだ a relayed report.
One kana apart with opposite jobs — 行こうと思う (volitional) states the speaker's intention; 行くと思う (plain form) is conjecture about what will merely happen.