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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 doraibu suru
doraibu shinai
Polite doraibu shimasu
doraibu shimasen
Past Indicative Plain doraibu shita
doraibu shinakatta
Polite doraibu shimashita
doraibu shimasen deshita
Presumptive Plain doraibu shiyō
doraibu suru darō
doraibu shinai darō
Polite doraibu shimashō
doraibu suru deshō
doraibu shinai deshō
Past Presumptive Plain doraibu shitarō
doraibu shita darō
doraibu shinakatta darō
Polite doraibu shimashitarō
doraibu shinakatta deshō
Present Progressive Plain
Polite doraibu shite imasu
doraibu shite imasen
Past Progressive Plain
Polite doraibu shite imashita
doraibu shite imasen deshita
Provisional Plain doraibu sureba
doraibu shinakereba
Polite doraibu shimaseba
doraibu shimasureba
doraibu shimasen nara
Conditional Plain doraibu shitara
doraibu shinakattara
Polite doraibu shimashitara
doraibu shimasen deshitara
Potential Plain doraibu dekiru
doraibu dekinai
Polite doraibu dekimasu
doraibu dekimasen
Causative Plain doraibu saseru
Imperative Plain doraibu shiro
doraibu suruna
Polite doraibu shite kudasai
doraibu shinaide kudasai
Passive Plainsareru