Conjugation

こする

kosuru

rub

Godan verb, group 1, ending -ru.

Conjugated like なる, やる, 知る, 祀る, 入れ替わる, 読み取る

Newbie

The polite forms to talk about now, the future, and the past, and the te-form of requests.

  1. Polite present · -masu

    What you do, usually or soon, said politely. Japanese has one form for the present and the future.

    1. affirmativeこすりますkosurimasu
    2. negativeこすりませんkosurimasen

  2. Polite past · -mashita

    What you did, or did not do, said politely.

    1. affirmativeこすりましたkosurimashita
    2. negativeこすりませんでしたkosurimasen deshita

  3. Te-form

    Links actions (and then…), and with ください asks politely.

    1. こすってkosutte
    2. requestこすってくださいkosutte kudasai

  4. Let’s · -mashō

    To suggest doing something together: let’s…

    1. こすりましょうkosurimashō

  5. Wanting to · -tai

    What you want to do. Add です to be polite.

    1. affirmativeこすりたいkosuritai
    2. negativeこすりたくないkosuritakunai
BeginnerThe plain forms of everyday speech, what is going on, what you can do, conditions, and the passive.Plain present · dictionary form · Plain past · -ta · Ongoing · -te iru · Potential · If, when · -tara · PassiveAlso show the Beginner forms (6)

  1. Plain present · dictionary form

    Between friends and family, and before a noun or many phrases. It also says the future.

    1. affirmativeこするkosuru
    2. negativeこすらないkosuranai

  2. Plain past · -ta

    The past between friends and family, and before a noun.

    1. affirmativeこすったkosutta
    2. negativeこすらなかったkosuranakatta

  3. Ongoing · -te iru

    What is going on now, a habit, or a state that lasts: 結婚している, to be married.

    1. plainこすっているkosutte iru
    2. politeこすっていますkosutte imasu

  4. Potential

    What you can do. Its object often takes が: 日本語が話せる.

    1. plainこすれるkosureru
    2. politeこすれますkosuremasu

  5. If, when · -tara

    If or once something happens, and what you found when it did.

    1. こすったらkosuttara

  6. Passive

    What is done to someone, often to their regret: に marks who does it. It is also a respectful way to speak of others.

    1. plainこすられるkosurareru
    2. politeこすられますkosuraremasu
IntermediateIntentions, orders, conditions, making someone do something, and the verbs of respect and modesty.Volitional · -ō, -yō · Command · Condition · -ba · Causative · Causative passiveAlso show the Intermediate forms (5)

  1. Volitional · -ō, -yō

    Let’s, between friends; with と思う, what you intend to do.

    1. こすろうkosurō

  2. Command

    A blunt order or ban (〜な), heard in sports, on signs, and between men. Politely, say 〜てください.

    1. orderこすれkosure
    2. banこするなkosuru na

  3. Condition · -ba

    If…: the condition for what follows. In the negative, it also says what you must do: 〜なければならない.

    1. affirmativeこすればkosureba
    2. negativeこすらなければkosuranakereba

  4. Causative

    Making or letting someone do something: に or を marks who does it.

    1. plainこすらせるkosuraseru
    2. politeこすらせますkosurasemasu

  5. Causative passive

    Being made to do something you did not want to. In speech, godan verbs often shorten -aserareru to -asareru.

    1. plainこすらせられるkosuraserareru
    2. politeこすらせられますkosuraseraremasu