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Suru is one of the only two irregular Japanese verbs. It can be combined with verbs of chinese origin and other loan words to form compound verbs.
Verb ClassIrregular
Stemsu -
This is for a guide only. Please double-check if you need to use the information for something important. I've done my best to get everything right but like any self respecting software there may be bugs in it! .
Present Indicative Plain kaimono suru
kaimono shinai
Polite kaimono shimasu
kaimono shimasen
Past Indicative Plain kaimono shita
kaimono shinakatta
Polite kaimono shimashita
kaimono shimasen deshita
Presumptive Plain kaimono shiyō
kaimono suru darō
kaimono shinai darō
Polite kaimono shimashō
kaimono suru deshō
kaimono shinai deshō
Past Presumptive Plain kaimono shitarō
kaimono shita darō
kaimono shinakatta darō
Polite kaimono shimashitarō
kaimono shinakatta deshō
Present Progressive Plain
Polite kaimono shite imasu
kaimono shite imasen
Past Progressive Plain
Polite kaimono shite imashita
kaimono shite imasen deshita
Provisional Plain kaimono sureba
kaimono shinakereba
Polite kaimono shimaseba
kaimono shimasureba
kaimono shimasen nara
Conditional Plain kaimono shitara
kaimono shinakattara
Polite kaimono shimashitara
kaimono shimasen deshitara
Potential Plain kaimono dekiru
kaimono dekinai
Polite kaimono dekimasu
kaimono dekimasen
Causative Plain kaimono saseru
Imperative Plain kaimono shiro
kaimono suruna
Polite kaimono shite kudasai
kaimono shinaide kudasai
Passive Plainsareru