Verb Patterns
Samat ____________ work today - his shop is closed.
Samat doesn't have to work today - his shop is closed.
Sarah ________ study very hard - she has exams soon.
Sarah has to study very hard - she has exams soon.
_____ your sister ______ go to New York for her job interview?
Does your sister have to go to New York for her job interview?
You mustn't leave the door open - the dog will get out.
The concert is free. You don't have to/mustn't pay.
The concert is free. You don't have to pay.