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