Present, Future 席に着く, 席に着きます [does], will [do] 席に着かない, 席に着きません doesn't [do], will not [do] Past 席に着いた, 席に着きました [did] 席に着かなかった, 席に着きませんでした didn't [do] Te-form, Continuative 席に着いて, 席に着きまして 席に着かないで, 席に着きませんで 席に着かなくて Progressive 席に着いている, 席に着いています [doing], to be [doing] 席に着いていない, 席に着いていません not [doing] Volitional 席に着こう, 席に着きましょう let's [do]!, I/we will [do], I/we intend to [do] 席に着くまい, 席に着きますまい I will not [do], I do not intend to [do] Imperative 席に着け, 席に着きなさい [do] ! 席に着くな, 席に着きなさるな don't [do] ! Request 席に着いてください please [do] 席に着かないでください please don't [do] Provisional 席に着けば if X [does], if X [is ~] 席に着かなければ if X doesn't [do], if X [is not ~] Conditional 席に着いたら, 席に着きましたら if X were to [do], when X [does] 席に着かなかったら, 席に着きませんでしたら if X weren't to [do], when X doesn't [do] Potential 席に着ける, 席に着けます be able to [do], can [do] 席に着けない, 席に着けません not be able to [do], can't [do] Passive, Respectful 席に着かれる, 席に着かれます is [done] (by ...), will be [done] (by ...) 席に着かれない, 席に着かれません isn't [done] (by ...), will not be [done] (by ...) Causative 席に着かせる, 席に着かせます makes/will make (someone) [do] 席に着かせない, 席に着かせません doesn't/won't make (someone) [do] Causative passive 席に着かせられる, 席に着かせられます is made/will be made to [do] (by someone) 席に着かせられない, 席に着かせられません isn't made/won't be made to [do] (by someone) ~たい form 席に着きたい want to [do] 席に着きたくない don't want to [do]