if (someone) works hard, if (someone) does their best
もっと頑張ればよかったんだよ。
I should have tried harder.
頑張ればいっぱい貰えるよ
The harder you work, the more you'll get.
— 動くな、死ね、甦れ! (1990)
勉強さえ頑張れば
As long as you work hard at your studies
— いまを生きる (1989)