기억해야

must remember, have to remember

→ 기억하다
verb Rare #28,061
must remember, have to remember Usually followed by 해, 돼, or another verb ending to complete the expression.
KO: 이 날짜는 꼭 기억해야 해.
EN: You have to remember this date.
Conjugation of 기억하다
Necessitative
기억해야

그러니 내가 더 잘 기억해야 했다고 누구도 탓할 수는 없다.

So no one can blame me for having to remember more clearly.

그걸 꼭 기억해야 해

You really need to remember that.

— 귀향 (2006)

모두 기억해야 돼

You have to remember everything.

— 컴 앤 씨 (1985)