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