HAVE TO
Have to is not a modal verb, but we use have to like must, and we use don´t have to like needn´t.
We use have to when we want to say «This is necessary / « Is this necessary?
Examples:
You have to drive on the left in Britain.
My father has to work on Saturdays.
1. Complete the sentences with has to.
be be be carry have wear
a) An accountant __________ good with numbers.
b) A police officer __________ an uniform.
c) A doctor ___________ very clean hands.
d) A builder ___________ heavy things.
e) A politician _____________ good at speaking.
f) A secretary.______________ good spelling.
2. Complete the sentences with don´t / doesn´t have to.
You ___________ any food to the dogs. They only eat twice a day.
You ___________ close the windows. It´s hot in the room.
Sara ___________ water the flowers . It´s raining.
Mary ___________ post that letters. I´m going to the post office .
You ___________ go by bus. My Mother will drive you .
You ___________ speak French. Everyone here understands English.
23. Write some sentences about what you have to or don´t have to do at school.
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