Unit 17 (plants must have water)
Pupil’s book book page 69 ex 3 (Look and say)
Must (obligation)
We must do homework.
We must listen to our parents.
I must study well for exams
You must have breakfast before you come to school
When you carry something made of glass, you must be careful.
Mustn’t ( not allowed)
You mustn’t talk in the class
You mustn’t run in the class
Don’t have to ( I can do something if I want)
I’ll go to the museum. You don’t have to take your bags
Tomorrow is Friday, I don’t have to get up early
Tommorow is Monday,I must wake up early to go to school
Tomorrow is Friday, so I don't have to wake up early.