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