be supposed to 의 뉘앙스

be supposed to 의 뉘앙스를 구글 검색해봤다.

have to, be supposed to, ought to 의 뉘앙스 차이가 설명되어 있다.

Have to is the same as must.
It implies that you don't have a choice.

To be supposed to means an obligation or a ​responsibility. (의무, 책임)
It is something that you should do, or something that another person expects you to do.

Ought to means a suggestion. (충고, 제안)
You should do something but you don't have to do it.

The ​children are supposed to be at ​school by 8:45 a.m.
아이들은 8시 45분까지 학교에 있기로 되어 있다. → 아이들은 8시 45분까지 학교에 가야 한다
What are you doing out of ​bed? You're supposed to be ​asleep.
너 침대 밖에서 뭐하는 거야? 너 자고 있어야 되잖아
These ​batteries are supposed to last for a ​year.
이 배터리들은 보증 유효기간이 1년이야
Am I supposed to be at the meeting on Tuesday?
내가 목요일 회의에 참석해야 되는 건가요?
MiMi is supposed to meet her friend tonight.
미미는 오늘밤 친구와 만나기로 되어 있잖아
The flight is supposed to arrive at 4 p.m.
그 비행기는 4시에 도착하기로 되어 있어 (→ 4시 도착 예정이야)
You're supposed to see a doctor this morning.
너 오늘 오전에 의사한테 진찰받기로 되어 있잖아.

I'm afraid you have to take off your shoes. (신발을 벗었으면 합니다)

* I'm afraid 뉘앙스는 관련 게시글로 올려져 있음