ば conditional stem

〜ばN4

if — general, lawlike condition

〜ばよかったN4

should have; wish I had — regret over what wasn't done

〜ば〜ほどN4

the more you do X, the more Y — two things rising together

〜ばいいN4

it'd be good to do; you can just do — low-stakes advice

もし〜ばN5

if; supposing — marks what follows as only a guess

〜ばいいのに

I wish it were so — said against a fact that is otherwise