Read the rule about the modal verb have to.
We use have to / has to to say that something is necessary.
Example: We have to brush or teeth everyday.
We use don't have to / doesn't have to to say that something is necessary.
Example: You don't to clean the room. I cleaned it this morning.
Have to changes in the third person:
I/ you/ we/ they - have to He/ she/it - has to
Example:
I/ You/ We/ They have to school.
He/ She/ It has to go to bed.
With have to, we form questions with do/does and we form negatives with don't/doesn't.
Example:
Do I/ you/ we/ they have to wash the dishes? - Yes, I/ you/ we/ they./ No, I/ you/ we/ they don't.
Does he/ she/ it have to sleep? - Yes,he/ she/ it does. / No, he/ she/ it doesn't.
I/ You/ We/ They don't have to school.
He/ she/it doesn't have to read this book.
Choose the best answer: A, b or C
