안된다

안된다

"안된다" means "It must not be," "It won't do," or "It's not allowed."

Here '안된다' implies a prohibition or advice against a specific action, indicating that the action 'sleeping too late' is not desirable.

너무 늦게 자면 안된다.

You must not sleep too late.

In this sentence, '안된다' expresses that undertaking the plan currently is inadvisable or prohibited.

그 계획은 지금 진행하면 안된다.

That plan must not be carried out now.

Here '안된다' denotes the undesirability of a situation where the phone battery drains, highlighting a negative outcome to be avoided.

휴대전화 배터리가 떨어지면 안된다.

The mobile phone battery must not drain.