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