ば-form
The ば-forms of a verb represents hypothetical situation or activity. For ば-forms of the affirmative, drop the final vowel "u" and add "eba". ex) たべる(taberu)→たべれば(tabereba) いく(iku)→いけば(ikeba) くる(kuru)→くれば(kureba) For ば-forms of the negative, drop the final い and add ければ. ex) たべない→たべなければ いかない→いかなければ こない→こなければ ばよかったです means "I wish I had done something" or "I should have done something". なければよかったです means "I wish I had not done something" or "I should not have done something". <Example Sentences> あさごはん を たべればよかったです。 I should have eaten breakfast. きのう パーティ に いけばよかったです。 I should have been to the party yesterday. よなか に ラーメン を たべなければよかったです。 I should not have eaten a ramen noodle in the middle of the night. きのう パーティ に いかなければよかったです。 I should not have been to the party yesterday. References: Verb Conjugation https://anchor.fm/yuya-sato/episodes/Verb-Conjugation-emv716 Te-forms https://anchor.fm/yuya-sato/episodes/Te-forms-enfaqj Volitional Form https://anchor.fm/yuya-sato/episodes/Volitional-Form-epmave Instagram: https://www.instagram.com/yuyaman1986