ないといけない

expression, i-adjective

have to; must

Attaches to the negative base of a verb (ない-form) to express obligation or necessity. Equivalent to なければならない, but slightly more colloquial.

See also: なくてはいけない

• 明日あしたまでにレポートを出ださないといけない。

  I have to submit the report by tomorrow.

• もう行いかないといけない時じ間かんだ。

  It's time I must go.

expression, i-adjective

indispensable; absolutely necessary

Used when something itself is essential, not as an auxiliary. Often appears in statements like ～がないといけない (without ~ it's no good).

See also: なくてはいけない

• この仕し事ごとには経けい験けんがないといけない。

  Experience is indispensable for this job.

• 健けん康こうでないといけない。

  You must be healthy. (lit. It is necessary to be healthy.)