Have To - How To Form
INSTRUCTIONS
Have To / Don't Have To. Read the grammar reference about how to form Positives, Negatives, and Questions of "Have To" / "Don't Have To" Construction.
Then do the exercises on the Have To and Have Got To - Practice page.

Albert Einstein
Why do you have to click the Start button to shut down? The same reason you turn the ignition key to shut off your car.Have To - When To Use | Have To - When To Use Exercise | Have To - When To Use Exercise Answers | Have To - How To Form | Have To - How To Form Exercise | Have To - How To Form Exercise Answers
Read the grammar reference about "Have To" - Positives, Negatives, and Questions
Then do the exercises on Have To and Have Got To - Practice page.
Have to is a construction (structure). It is not a modal verb. We use auxiliary verbs do and does to form questions and negatives.
Examples:
Positive
I have to work very unsociable hours.
She has to wear a uniform.
Negative
I don't have to work at weekends.
John doesn't have to do any work at home.
Question
Do I have to pay in advance?
Does your father have to travel a lot at his job?
With have got to negatives and questions are formed differently.
Examples:
Positive
I've got to work very unsociable hours.
She's got to wear a uniform.
Negative
I haven't got to work at weekends.
John hasn't got to do any work at home.
Question
Have I got to pay in advance?
Has you father got to travel a lot at his job?
Now do the exercises on Have To and Have Got To - Practice page.
Have To - When To Use | Have To - When To Use Exercise | Have To - When To Use Exercise Answers | Have To - How To Form | Have To - How To Form Exercise | Have To - How To Form Exercise Answers