2 Choose the correct words.
1 You should /mustn't forget to call me tonight,
2 Students should / mustn't run in the corridors.
3 You must / shouldn't stay up so late - you're
tired today
4 I think they must / should relax more.
5 We shouldn't / mustn't be noisy in the library.
have to/don't have to
We/You/They have to
He/She/lt
has to
practise.
IWW/You/They don't have to
He/She/lt
doesn't have to
Do
I/we/you/they
?
have to practise.
Does he/she/it
\/we/you/they do.
of Yes,
he/she/it
does.
I/we/you/they don't.
No,
he/she/it
doesn't.
We use have to to say what is necessary to do.
You have to answer all the questions in the exam.
Toby has to look after his sister this afternoon.
We use don't have to to say what isn't necessary to do,
but is an option or a choice.
I don't have to help you with the homework.
Elsie doesn't have to get up early tomorrow.
Question words go at the beginning of the question.
How much homework do you have to do?
When do we have to make a decision?​