May I take your dictionary?
At the English lesson you must speak only English.
Must we hand in our exercise books today?
May I ask you a question? — Yes, you are welcome (Yes, you may).
I cannot go to the cinema with you because I am very busy.
May I stay here? — Yes, you are welcome (Yes, you may).
He must be in his office now. You can speak to him.
May I come in? — You are welcome. (Yes, you may.)
You must read this text.
Can he perform a few simple tasks on the computer?
I must speak to my friend today.
We must pay this electricity bill by the end of the month.
This woman is an excellent driver. She can even drive a bus.
May I have a tuna sandwich and a cup of coffee?