日 日本語の国 Nihongo no Kuni: A little every day

N4 · GRAMMAIRE

~なければならない: must do

Express obligations in Japanese.

The rule

From the negative form in ない, replace ない with なければならない. This indicates a necessity or obligation. The polite version is ~なければなりません.

Examples

あしたはやくおきなければなりません。

Tomorrow, I have to get up early.

くすりをのまなければなりません。

I have to take the medicine.

Remember

Common mistake

Consolidate ~なくてもいい (not necessary) and ~なければならない (obligation).

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