Japanese reference
恋する
こいする
to be in love; to love romantically
Irregular · 32 form tables
Rows describe verb forms and levels of politeness. Honorific and humble forms are labeled separately. Strong commands appear under additional forms.
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Basic
Non past
| Person, form or usage | Form and meaning |
|---|---|
| Dictionary form | こいする (koisuru)be in love |
| Polite, masu | こいします (koishimasu)be in love |
Negative
| Person, form or usage | Form and meaning |
|---|---|
| Negative, nai | こいしない (koishinai)not be in love |
| Polite negative | こいしません (koishimasen)not be in love |
Past
| Person, form or usage | Form and meaning |
|---|---|
| Past, ta | こいした (koishita)was in love |
| Polite past | こいしました (koishimashita)was in love |
Past negative
| Person, form or usage | Form and meaning |
|---|---|
| Past negative | こいしなかった (koishinakatta)was not in love |
| Polite past negative | こいしませんでした (koishimasendeshita)was not in love |
Linking
Te form
| Person, form or usage | Form and meaning |
|---|---|
| Te-form | こいして (koishite)being in love (and then) |
| Polite te-form | こいしまして (koishimashite)being in love (and then) |
Te iru
| Person, form or usage | Form and meaning |
|---|---|
| Te-iru: ongoing action / resulting state | こいしている (koishiteiru)be in love |
| Polite te-iru | こいしています (koishiteimasu)be in love |
Conditional, ba
| Person, form or usage | Form and meaning |
|---|---|
| Conditional, ba | こいすれば (koisureba)if you are in love |
| Rare literary polite conditional | こいしますれば (koishimasureba)if you are in love (rare and literary). In ordinary polite conversation, use the plain conditional and make the main clause polite |
Conditional, tara
| Person, form or usage | Form and meaning |
|---|---|
| Conditional, tara | こいしたら (koishitara)if you are in love |
| Polite conditional, tara | こいしましたら (koishimashitara)if you are in love |
Mood
Potential
| Person, form or usage | Form and meaning |
|---|---|
| Potential | こいできる (koidekiru)can be in love |
| Polite potential | こいできます (koidekimasu)can be in love |
Volitional
| Person, form or usage | Form and meaning |
|---|---|
| Volitional | こいしよう (koishiyou)let's be in love! |
| Polite volitional | こいしましょう (koishimashou)let's be in love! |
Desire, tai
| Person, form or usage | Form and meaning |
|---|---|
| Desire, tai | こいしたい (koishitai)want to be in love |
| Polite desire, tai | こいしたいです (koishitaidesu)want to be in love |
Voice
Passive
| Person, form or usage | Form and meaning |
|---|---|
| Passive | こいされる (koisareru)be affected when someone is in love |
| Polite passive | こいされます (koisaremasu)be affected when someone is in love |
Causative
| Person, form or usage | Form and meaning |
|---|---|
| Causative | こいさせる (koisaseru)make or let someone be in love |
| Polite causative | こいさせます (koisasemasu)make or let someone be in love |
Causative passive
| Person, form or usage | Form and meaning |
|---|---|
| Causative-passive | こいさせられる (koisaserareru)be made to be in love |
| Polite causative-passive | こいさせられます (koisaseraremasu)be made to be in love |
Commands
Negative imperative
| Person, form or usage | Form and meaning |
|---|---|
| Negative imperative | こいするな (koisuruna)do not be in love! |
| Polite negative request | こいしないでください (koishinaidekudasai)please do not be in love |
Polite
Polite non past
| Person, form or usage | Form and meaning |
|---|---|
| Polite non-past form | こいします (koishimasu)be in love |
Polite negative
| Person, form or usage | Form and meaning |
|---|---|
| Polite negative form | こいしません (koishimasen)not be in love |
Polite past
| Person, form or usage | Form and meaning |
|---|---|
| Polite past form | こいしました (koishimashita)was in love |
Polite past negative
| Person, form or usage | Form and meaning |
|---|---|
| Polite past negative form | こいしませんでした (koishimasendeshita)was not in love |
Requests
Request with kudasai
| Person, form or usage | Form and meaning |
|---|---|
| Request with kudasai | こいしてください (koishitekudasai)please be in love |
Negative request
| Person, form or usage | Form and meaning |
|---|---|
| Request not to act | こいしないでください (koishinaidekudasai)please do not be in love |
Invitation with mashou
| Person, form or usage | Form and meaning |
|---|---|
| Invitation with mashou | こいしましょう (koishimashou)let's be in love! |
Permission
| Person, form or usage | Form and meaning |
|---|---|
| Permission | こいしてもいい (koishitemoii)may be in love |
| Polite permission | こいしてもいいです (koishitemoiidesu)may be in love |
Not allowed
| Person, form or usage | Form and meaning |
|---|---|
| Not allowed | こいしてはいけない (koishitehaikenai)must not be in love |
| Polite prohibition | こいしてはいけません (koishitehaikemasen)must not be in love |
Instruction with nasai
| Person, form or usage | Form and meaning |
|---|---|
| Instruction with nasai | こいしなさい (koishinasai)be in love (instruction) |
Aspect
Try doing
| Person, form or usage | Form and meaning |
|---|---|
| Try doing | こいしてみる (koishitemiru)try to be in love |
| Polite try doing | こいしてみます (koishitemimasu)try to be in love |
Completion or regret
| Person, form or usage | Form and meaning |
|---|---|
| Completion or regret | こいしてしまう (koishiteshimau)be in love completely or regrettably |
| Polite completion or regret | こいしてしまいます (koishiteshimaimasu)be in love completely or regrettably |
Preparation
| Person, form or usage | Form and meaning |
|---|---|
| Preparation | こいしておく (koishiteoku)be in love in advance |
| Polite preparation | こいしておきます (koishiteokimasu)be in love in advance |
Past experience
| Person, form or usage | Form and meaning |
|---|---|
| Past experience | こいしたことがある (koishitakotogaaru)have the experience of: was in love |
| Polite past experience | こいしたことがあります (koishitakotogaarimasu)have the experience of: was in love |
Conditions
Automatic result, to
| Person, form or usage | Form and meaning |
|---|---|
| Automatic result, to | こいすると (koisuruto)whenever you be in love |
| Polite automatic result | こいしますと (koishimasuto)whenever you be in love |
Given that, nara
| Person, form or usage | Form and meaning |
|---|---|
| Given that, nara | こいするなら (koisurunara)if you mean to be in love |
Probability
| Person, form or usage | Form and meaning |
|---|---|
| Probability | こいするだろう (koisurudarou)probably be in love |
| Polite probability | こいするでしょう (koisurudeshou)probably be in love |
Additional forms
Strong command
| Person, form or usage | Form and meaning |
|---|---|
| Imperative | こいしろ (koishiro)be in love! |
| Polite request | こいしてください (koishitekudasai)please be in love |
Forms from the Loquus reference. Only supplied forms are shown. Browse all Japanese entries.