Conjugation

予防する

よぼうするyobō suru

prevent

Irregular verb, group 3, noun + する.

Conjugated like する, 勉強する, 注文する, 予測する, 予言する, 交渉する

  • Like する

    予防する conjugates like する: only する changes, and its potential is 予防できる.

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予防しますよぼうしますyobō shimasu
    2. negative予防しませんよぼうしませんyobō shimasen

  2. Polite past · -mashita

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

    1. affirmative予防しましたよぼうしましたyobō shimashita
    2. negative予防しませんでしたよぼうしませんでしたyobō shimasen deshita

  3. Te-form

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

    1. 予防してよぼうしてyobō shite
    2. request予防してくださいよぼうしてくださいyobō shite kudasai

  4. Let’s · -mashō

    To suggest doing something together: let’s…

    1. 予防しましょうよぼうしましょうyobō shimashō

  5. Wanting to · -tai

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

    1. affirmative予防したいよぼうしたいyobō shitai
    2. negative予防したくないよぼうしたくないyobō shitakunai
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予防するよぼうするyobō suru
    2. negative予防しないよぼうしないyobō shinai

  2. Plain past · -ta

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

    1. affirmative予防したよぼうしたyobō shita
    2. negative予防しなかったよぼうしなかったyobō shinakatta

  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予防しているよぼうしているyobō shite iru
    2. polite予防していますよぼうしていますyobō shite imasu

  4. Potential

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

    1. plain予防できるよぼうできるyobō dekiru
    2. polite予防できますよぼうできますyobō dekimasu

  5. If, when · -tara

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

    1. 予防したらよぼうしたらyobō shitara

  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予防されるよぼうされるyobō sareru
    2. polite予防されますよぼうされますyobō saremasu
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. 予防しようよぼうしようyobō shiyō

  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予防しろよぼうしろyobō shiro
    2. ban予防するなよぼうするなyobō suru 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予防すればよぼうすればyobō sureba
    2. negative予防しなければよぼうしなければyobō shinakereba

  4. Causative

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

    1. plain予防させるよぼうさせるyobō saseru
    2. polite予防させますよぼうさせますyobō sasemasu

  5. Causative passive

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

    1. plain予防させられるよぼうさせられるyobō saserareru
    2. polite予防させられますよぼうさせられますyobō saseraremasu