I must clean them.
We must go to the bank today.
I must hurry.
I mustn't forget to phone Julia.
You mustn't be sad.
You mustn't touch the pictures.
You must learn to drive.
My father is going to buy me a bike.
(Babam bana bisiklet alacak.)
You really must read this book.
You must be joking! --> Şaka yapıyor olmalısın!
'm already late, I must fly. --> Çoktan geç kaldım, uçmalıyım.