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