Must (do something)
This phrase emphasizes an obligation to perform an action.
Exemplos
時間通りに来なければならない。
You must arrive on time.
お客様のご希望を聞かなければならない。
I must hear the customers' requests.
清潔にしなければならない。
You must keep it clean.
Verificação rápida
Você deve chegar na hora.