JLPT N46 min readUpdated May 17, 2026Grammar pattern

と思うto omou“I think that”

Use と思う when you want to express I think that in a Japanese sentence.

Meaning
I think that
Pattern
と思う
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JLPT grammar
JLPT
N4

と思う means I think that. It is a JLPT N4 Japanese grammar pattern used to state a personal opinion or belief.

You will see it constantly in conversation, textbooks, and the JLPT N4 test. Learning it early makes your Japanese sound more natural when you want to share what you believe or expect.

What does と思う mean?

Use と思う when you want to express I think that in a Japanese sentence.

Natural translations include:

  • I think that
  • I believe that
  • It seems to me that

Try to notice the speaker’s purpose first, then choose the English phrase that fits that context.

How to form と思う

と思う attaches to the plain form of whatever you are thinking.

Plain form + と思う
  • Verb (plain form) + と思う
  • い-adjective + と思う
  • な-adjective + だ + と思う
  • Noun + だ + と思う

In polite speech, 思う becomes 思います.

Common shapes from the example sentences:

  • 雨(あめ)だと思います
  • 面白(おもしろ)いと思います
  • 来(こ)ないと思います

When is と思う used?

Use と思う in situations like:

  • reading or writing JLPT N4-level sentences
  • making a sentence more precise than a basic N5 pattern
  • recognizing natural grammar in conversation or short passages

Tone and register:

  • neutral; usable in both casual and polite conversation
  • extremely common in JLPT N4 grammar study and everyday Japanese

と思う example sentences

明日(あした)は雨(あめ)だと思(おも)います。
I think it will rain tomorrow.
noun + だ
この本(ほん)は面白(おもしろ)いと思(おも)います。
I think this book is interesting.
い-adjective
田中(たなか)さんは来(こ)ないと思(おも)います。
I think Tanaka will not come.
verb plain negative
もっと練習(れんしゅう)したほうがいいと思(おも)います。
I think you should practice more.
embedded advice
日本語(にほんご)は楽(たの)しいと思(おも)います。
I think Japanese is fun.
い-adjective

After reading each sentence, ask what job と思う is doing: it wraps the speaker’s inner thought and presents it as a personal belief.

Nuance of と思う

The key nuance is that と思う quotes your own thought. It turns a statement into a personal belief rather than an objective fact.

A pattern may look simple, but it signals that the speaker is offering an opinion, not declaring a certainty.

For example, saying 雨(あめ)だ implies certainty. Saying 雨(あめ)だと思(おも)う softens it into a personal expectation. The difference is social, not just grammatical: you are marking the boundary between fact and belief.

と思う vs でしょう

Both と思う and でしょう can express uncertainty, but they do different jobs.

と思う
Personal belief
Use when you want to say "I think..."
明日(あした)は雨(あめ)だと思(おも)います。
I think it will rain tomorrow.
vs
でしょう
Conjecture or expectation
Use when you expect something is likely, often shared knowledge
明日(あした)は雨(あめ)でしょう。
It will probably rain tomorrow.

Is the speaker stating a private opinion, or making a guess based on evidence? と思う keeps the focus on the speaker’s mind; でしょう keeps the focus on the situation.

Common mistakes with と思う

❌
明日(あした)は雨(あめ)ですと思(おも)います。
✅
明日(あした)は雨(あめ)だと思(おも)います。
Use the plain form before と思う, not the polite です form.
❌
雨(あめ)だ思(おも)います。
✅
雨(あめ)だと思(おも)います。
Do not drop the quoting particle と.
❌
日本語(にほんご)は楽(たの)しいでしょう。(when you mean "I think Japanese is fun")
✅
日本語(にほんご)は楽(たの)しいと思(おも)います。
でしょう is for conjecture or shared expectation, not for stating a personal belief.

Is と思う on the JLPT?

N4

Yes. と思う is commonly taught as JLPT N4 grammar.

  • Recognize it in reading and listening
  • Understand the difference between a stated fact and a quoted thought
  • Use it in simple original sentences

Practice questions for と思う

1 Write one short sentence using the basic structure: [plain form] + と思います. formation
2 Replace the subject, time, or object and keep the same grammar point. variation
3 Compare your sentence with でしょう. Does the meaning or tone change? contrast

Learning path for と思う

Use と思う as part of your JLPT N4 quotation, thought, and definition grammar toolkit. Practice the quoted or defined content before と思う. These patterns depend on where the thought, question, name, or explanation begins and ends, so sentence boundaries matter more than a single English gloss.

1
First, make sure you can form と思う without looking at the pattern chart.
2
Next, compare it with でしょう. Choosing between them helps you understand the nuance of personal belief versus conjecture.
3
Then, write a sentence with と思う in its most literal meaning, change the subject or time expression, and check if the thought boundary is clear.
4
Finally, add という or ということ to see how the nuance of quoting changes.

Learn と思う with Hane

If you want to review と思う together with the related patterns above, Hane helps you practice Japanese in short, focused sessions.

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FAQ about と思う

What does と思う (to omou) mean in Japanese?

と思う (to omou) means “I think that”. It is JLPT N4 grammar. Use と思う when you want to express I think that in a Japanese sentence.

How do you form と思う (to omou)?

と思う attaches to the plain form of whatever you are thinking. Plain form + と思う Verb (plain form) + と思う い-adjective + と思う な-adjective + だ + と思う Noun + だ + と思う In polite speech, 思う becomes 思います.

What is the difference between と思う and でしょう?

と思う: Personal belief. でしょう: Conjecture or expectation.

What is an example sentence with と思う (to omou)?

明日は雨だと思います。 — I think it will rain tomorrow.

Practice this with Hane
Drill と思う until it’s automatic.

Short, focused iOS sessions for grammar, kanji, vocabulary, reading, and JLPT review. Use this lesson with the JLPT prep app and the Japanese learning app overview.

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