You don't know what 'stuff' means.
What does 'stuff' mean?
You are thirsty.
Can/May I drink some water?
You are late.
I`m sorry for being late.
You are tired.
Can we take a break?
It's so hot in here.
Can you please open the window?
What do you say when you don't know how to say something in English?
Sorry, what's the English for ...?
You didn't hear the teacher.
Can you repeat please?
What do you say when it's too dark in the classroom?
Can I switch on the lights?
You have a question
Can I ask a question?
You want to check your idea.
Is it correct? Am I right?
You don`t have a pen with you.
Can I take/borrow your pen?