Present, Future 知り得る, 知り得ます [does], will [do] 知り得ない, 知り得ません doesn't [do], will not [do] Past 知り得た, 知り得ました [did] 知り得なかった, 知り得ませんでした didn't [do] Te-form, Continuative 知り得て, 知り得まして 知り得ないで, 知り得ませんで 知り得なくて Progressive 知り得ている, 知り得ています [doing], to be [doing] 知り得ていない, 知り得ていません not [doing] Volitional 知り得よう, 知り得ましょう let's [do]!, I/we will [do], I/we intend to [do] 知り得まい, 知り得ますまい I will not [do], I do not intend to [do] Imperative 知り得ろ, 知り得よ, 知り得なさい [do] ! 知り得るな, 知り得なさるな don't [do] ! Request 知り得てください please [do] 知り得ないでください please don't [do] Provisional 知り得れば if X [does], if X [is ~] 知り得なければ if X doesn't [do], if X [is not ~] Conditional 知り得たら, 知り得ましたら if X were to [do], when X [does] 知り得なかったら, 知り得ませんでしたら if X weren't to [do], when X doesn't [do] Potential 知り得られる, 知り得られます be able to [do], can [do] 知り得られない, 知り得られません not be able to [do], can't [do] Passive, Respectful 知り得られる, 知り得られます is [done] (by ...), will be [done] (by ...) 知り得られない, 知り得られません isn't [done] (by ...), will not be [done] (by ...) Causative 知り得させる, 知り得させます makes/will make (someone) [do] 知り得させない, 知り得させません doesn't/won't make (someone) [do] Causative passive 知り得させられる, 知り得させられます is made/will be made to [do] (by someone) 知り得させられない, 知り得させられません isn't made/won't be made to [do] (by someone) ~たい form 知り得たい want to [do] 知り得たくない don't want to [do]