すぐに謝（あやま）ればいいのに、結局（けっきょく）謝（あやま）らなかった。

眠（ねむ）たいならちょっと仮眠（かみん）をとればいいのに。

運動（うんどう）すればいいだろう。

それいつまでにやればいい？

道（みち）の案内（あんない）を、誰（だれ）に聞（き）けばいいのか分（わ）からない。

ドライブに行（い）きたいなら、運転（うんてん）免許（めんきょ）を取（と）ればいいです。

欲（ほ）しいなら言（い）えばいいのに、誰（だれ）も何（なに）も言（い）ってくれない。

テニス上手（うま）くなりたいなら、もっと練習（れんしゅう）すればいいのに。

僕（ぼく）が出（で）ていけばいいんでしょう。悪（わる）いのは僕（ぼく）の方（ほう）なんだから。

少（すこ）し運動（うんどう）すればいい。きっとスッキリするはず。

そんなに無理（むり）しないで休憩（きゅうけい）すればいいのに。

仕事（しごと）に早（はや）く行（い）けばいいと思（おも）いますよ。

「～ばいい」と「～たらいい」と「～といい」

Difference between ”conditional” いい and 方がいい

<div class='writeup-body'>In contrast to ばよかった, which is used for expressing regret about something that someone wishes had been done, ばいい highlights that the speaker is hoping for a particular result, in relation to something that has not happened yet. This translates as 'It'd be good if (A)'. To use ばいい, add the conjunction particle ば, to the end of any verb, and then attach the い-Adjective, いい.<ul class='writeup-examples--holder'><li class='writeup-example'><div class='writeup-example--japanese'>どれを食（た）べればいいか迷（まよ）ってるところ。</div><div class='writeup-example--english'>About which would be good to eat, I am currently a bit lost.</div></li><li class='writeup-example'><div class='writeup-example--japanese'>行（い）ければいいけど、行（い）けるか分（わ）からない。</div><div class='writeup-example--english'>It would be good if I could go, but I don't know if I can.</div></li></ul>Although ばいい literally means 'if (A), it's good', it can also be used to give advice, and has a meaning that is similar to 'should (A)' in these situations. It is generally quite a soft way of giving advice.<ul class='writeup-examples--holder'><li class='writeup-example'><div class='writeup-example--japanese'>テストでいい点（てん）を取（と）りたかったら、勉強（べんきょう）すればいいんじゃない？</div><div class='writeup-example--english'>If you want a good grade on your test, shouldn't you just study?</div></li><li class='writeup-example'><div class='writeup-example--japanese'>そんなに疲（つか）れているなら、仕事（しごと）を休（やす）めばいい。</div><div class='writeup-example--english'>If you are that tired, you should just take a day off.</div></li></ul><div class='writeup-caution'><div class='caution-header'>Caution</div>ばいい may also be used when making statements about something that the speaker believes is not possible. In these cases, it is regularly paired with のに, and has the nuance of 'despite it being good if it were (A)'. This shows that the speaker thinks that (A) would be good, but is aware that (A) cannot/will not happen for some reason.<ul class='writeup-examples--holder'><li class='writeup-example'><div class='writeup-example--japanese'>明日（あした）早（はや）く起（お）きればいいのに、全然（ぜんぜん）寝（ね）れない。</div><div class='writeup-example--english'>Even though I want to wake up early tomorrow, I can't sleep at all.</div></li><li class='writeup-example'><div class='writeup-example--japanese'> 好（す）きなら彼（かれ）にそう言（い）えばいいのに。</div><div class='writeup-example--english'>Even though you should just say it if you like him… (Why don't you)</div></li><li class='writeup-example'><div class='writeup-example--japanese'>休（やす）めばいいのに、皆（みんな）真面目（まじめ）だから休（やす）まない。</div><div class='writeup-example--english'>They should take a break, but because they are all very diligent, they won't.</div></li></ul></div></div>

Grammar Info

ばいい

Can, Should, It'd be good if