Present, Future 株を買う, 株を買います [does], will [do] 株を買わない, 株を買いません doesn't [do], will not [do] Past 株を買った, 株を買いました [did] 株を買わなかった, 株を買いませんでした didn't [do] Te-form, Continuative 株を買って, 株を買いまして 株を買わないで, 株を買いませんで 株を買わなくて Progressive 株を買っている, 株を買っています [doing], to be [doing] 株を買っていない, 株を買っていません not [doing] Volitional 株を買おう, 株を買いましょう let's [do]!, I/we will [do], I/we intend to [do] 株を買うまい, 株を買いますまい I will not [do], I do not intend to [do] Imperative 株を買え, 株を買いなさい [do] ! 株を買うな, 株を買いなさるな don't [do] ! Request 株を買ってください please [do] 株を買わないでください please don't [do] Provisional 株を買えば if X [does], if X [is ~] 株を買わなければ if X doesn't [do], if X [is not ~] Conditional 株を買ったら, 株を買いましたら if X were to [do], when X [does] 株を買わなかったら, 株を買いませんでしたら if X weren't to [do], when X doesn't [do] Potential 株を買える, 株を買えます be able to [do], can [do] 株を買えない, 株を買えません not be able to [do], can't [do] Passive, Respectful 株を買われる, 株を買われます is [done] (by ...), will be [done] (by ...) 株を買われない, 株を買われません isn't [done] (by ...), will not be [done] (by ...) Causative 株を買わせる, 株を買わせます makes/will make (someone) [do] 株を買わせない, 株を買わせません doesn't/won't make (someone) [do] Causative passive 株を買わせられる, 株を買わせられます is made/will be made to [do] (by someone) 株を買わせられない, 株を買わせられません isn't made/won't be made to [do] (by someone) ~たい form 株を買いたい want to [do] 株を買いたくない don't want to [do]