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