Mother imposed this task on the children.
The children were told by their mother to fetch water.
Your questions are always difficult but also important.
It's healthy among friends to discuss feelings.
You can't order me around. You're mentally unsound!
My commander is you.
(Please! Go ahead. You first.)
(It's used as politeness formula to tell someone (who doesn't necessarily have to be above you) to go through a door first, take the last piece of teylu, etc.)
Neytiri is under obligation by/from Mo'at to teach Jake the ways of the Na'vi.
I'm sorry that I'm obliged to tell you this news.
Entu, don't do this; it's not healthy (mentally).
Your sister is not only beautiful but also intelligent.
1. He is above me (in some relevant hierarchy).
2. I am under him.
3. He has authority over me.
4. He is my boss.
He observes his duty to care for the kids every day.
His physical and mental health are perfect.
The Omaticaya assumed that Jake would never return after his treachery
Doctor Livingstone, I presume.
Before I leave, I want to speak.
Don't eat that. It's not healthful. (I.e., It will make you unhealthy.)
That obligation comes from Eywa.