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役立つ

to benefit

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Conjugation of 役立つ

This verb follows the godan conjugation pattern.
私/俺
Present informal tense
役立つ
yakudatsu
I benefit
Present informal negative tense
役立たない
yakudatanai
I don't benefit
Present formal tense
役立ちます
yakudachimasu
I benefit
Present formal negative tense
役立ちません
yakudachimasen
I do not benefit
私/俺
Past informal tense
役立った
yakudatta
I benefited
Past informal negative tense
役立たなかった
yakudatanakatta
I didn't benefit
Past formal tense
役立ちました
yakudachimashita
I benefit
Past formal negative tense
役立ちませんでした
yakudachimasen deshita
I did not benefit
私/俺
Imperative informal mood
役立て
yakudate
benefit
Imperative negative mood
役立つな
yakudatsu na
don't benefit
Imperative formal mood
役立ってください
yakudatte kudasai
please benefit
Imperative formal negative mood
役立たないでください
yakudatanai dekudasai
please do not benefit
私/俺
Te form - conjunctive stem
役立って
yakudatte
benefit
Passive stem
役立たれる
yakudatareru
benefited
Hypothetical tense
役立て
yakudate
if I benefited
Hypothetical conditional stem
役立てば
yakudateba
benefited
私/俺
Volitional stem
役立とう
yakudatō
will benefit
Potential stem
役立てる
yakudateru
benefited
Continuative stem
役立ち
yakudachi
benefiting
Causative stem
役立たせる
yakudataseru
allow to benefit
私/俺
Imperfective stem
役立た
yakudata
benefit

Examples of 役立つ

事態の打開に 役立つ

Someone who can speed things up.

さらに　石の矢は奴らの甲冑には 役立たない 命が惜しければ逃げろ

And they are covered in a skin that arrows and stones cannot pierce.

将来の基礎として 役立ちます、ケビン

Benchmark, for future business, Kevin.

話せて良かったよ 役立った

Well, thank you for taking the time to discuss what you do. You've been very helpful.

役立たず

Ken: Loser.

「このバカ、まぬけ、役立たず」

Can I talk to you for a second, please?

外すなよ　役立たず！

(Metallic tapping)

ウインナー・コート め ( 役立たず ) 何だ？

Walking wiener coat.