危ない
あぶない
dangerous, critical
i-adjective
Conjugation Table
Present
危ない
Negative
危なくない
Past
危なかった
Past Negative
危なくなかった
Te Form
危なくて
Adverbial
危なく
Conditional
危なければ
Presumptive
危ないでしょう
Example Sentences
ここは危ないから、気をつけてね。
It's dangerous here, so be careful.
Koko wa abunai kara, ki o tsukete ne.
昨日の道は危なかったです。
The road yesterday was dangerous.
Kinō no michi wa abunakatta desu.
その橋は危なくないです。
That bridge is not dangerous.
Sono hashi wa abunakunai desu.
Grammar Notes & Usage Tips
•Basic Conjugation**: As an i-adjective, 危ない (あぶない) follows standard i-adjective conjugation rules. To make it negative, say 危なくない (あぶなくない) for "not dangerous," and for the past tense, use 危なかった (あぶなかった) for "was dangerous."
•Connecting with Nouns**: When using 危ない before a noun, you don't need any additional particles—just place it directly before the noun, like 危ない道 (あぶないみち) for "dangerous road."
•Using with なる**: To express "becoming dangerous," pair 危ない with なる to say 危なくなる (あぶなくなる). Remember, the i-adjective changes to its adverbial form by replacing い with く.
•Watch for Context**: 危ない can also mean "critical" or "risky" in contexts beyond physical danger, like in 危ない状態 (あぶないじょうたい), meaning "critical condition," so keep an eye on the context to understand the nuance.
•い-adjective: Conjugates by changing the い ending