つい

つい means accidentally; without meaning to. It is a JLPT N3 grammar pattern used to show an action happened unintentionally or despite knowing better.

If you want to express that you did something on impulse — even though you knew you shouldn’t — つい is the pattern you need.

What does つい mean?

Use つい when you want to show an action happened unintentionally or despite knowing better.

Natural translations include:

• accidentally; without meaning to

The best translation depends on the sentence. Notice whether the speaker regrets the action or simply drifted into it, then choose the English phrase that fits.

How to form つい

Examples of the pattern:

• つい食べてしまう
• つい忘れた
• つい言ってしまった

The form after つい matters. In JLPT questions, wrong choices often attach つい to the dictionary form or other incorrect patterns.

When is つい used?

Use つい in situations like:

• describing an unintentional action you regret or know you should avoid
• reacting to sudden impulse or temptation
• making natural Japanese sentences that explain a slip-up

Tone and register:

• neutral — used in both spoken and written Japanese
• common in JLPT N3 reading passages, grammar questions, and everyday conversation

つい example sentences

After reading each sentence, ask what job つい is doing: the speaker acted on impulse and immediately recognizes it as unintentional.

Nuance of つい

The key nuance is a natural way to express “accidentally; without meaning to” with the right context and tone.

This matters because つい does more than match a single English phrase. It shows how the speaker frames the action as a momentary lapse — often one they regret or find hard to control.

For example:

• In context, it sounds natural when the surrounding sentence supports a feeling of impulse or regret.
• Compared with うっかり, it carries a different focus: つい emphasizes acting despite yourself, while うっかり emphasizes carelessness.

つい vs うっかり

Both つい and うっかり can describe accidental actions, but they are different.

If both words seem possible, check the cause. Did you give in to an urge (つい), or did you stop paying attention (うっかり)?

Common mistakes with つい

A helpful practice method is to write one sentence with つい, then rewrite it with うっかり. If the meaning or tone changes, explain that difference in your own words.

Is つい on the JLPT?

For test preparation, study the grammar point in full sentences. JLPT questions often test whether you understand the surrounding context, not just the dictionary meaning.

Practice questions for つい

Keep your first sentences simple. Once the structure feels natural, add more context so the nuance becomes clear.

Learning path for つい

To learn つい efficiently, review plain emotion verbs first, then practice patterns where the feeling is automatic, impulsive, or hard to control.

Related grammar to review next

• てしょうがない・てしかたがない — because it also expresses spontaneous feelings, urges, or emotional reactions.
• どうしても — because it also expresses strong impulse or unavoidable desire.
• ずにはいられない — because it also describes actions driven by irresistible urge.
• ふと — because it also describes sudden, unintentional actions.

Learn つい with Hane

If you want to review つい together with the related patterns above, Hane helps you connect grammar, kanji, and vocabulary in short, focused sessions.

Browse more lessons here:

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• JLPT N3 grammar lessons