What it means
つい is an adverb that expresses doing something unintentionally, impulsively, or despite intending not to do it. It often describes an action that happens because of a momentary lapse in attention or self-control, and the result is frequently undesirable. It usually comes directly before the verb or verb phrase it modifies.
Usage note
Do not confuse つい with ついに, which means “finally” or “at last.” つい can also mean “just” or “recently” in expressions such as つい先ほど, so the surrounding context determines its meaning.
How to use it
つい大切なメールを削除しました。
I accidentally deleted the important email.
つい大切なメールを削除した。
I accidentally deleted the important email.
Example sentences
健康のために甘い物を控えていたのに、ついケーキを二つも食べてしまいました。
Although I had been avoiding sweets for my health, I unintentionally ate as many as two pieces of cake.
駅で財布を落とさないように気をつけていたのに、ついスマートフォンを見ながら歩いてしまいました。
Even though I was being careful not to drop my wallet at the station, I ended up walking while looking at my smartphone without thinking.
図書館では静