Modal verbs for obligation, prohibition and advice: must, have to, ought to, should

1 Complete the text using the correct forms of the words.

Hi! I’m Harry and my school is organising a camping trip soon for all the students. We ___ get permission from our parents first, of course, before we can go.

I’m not sure if I _____ go or not.

My parents have said I ______ if I don’t want to. 

But I guess I _____ just stay at home and miss all the fun! 

We’ll ______ take our own clothes to wear.

But luckily we ____ take tents, because they’re provided. It's up to us.

And the teachers have said we ______ take our mobile phones in case they get lost! It’s not allowed! 

2 Complete the second sentence so that it means the same as the first.

Don’t talk in the library! It’s not permitted.

=

You ___ talk in the library. 

There’s no school tomorrow, because it’s a school holiday.

=

We _____ go to school tomorrow, because it’s a holiday.

My coach has advised me to try and go to football practice twice a week, if I can.

=

I _____ to go to football practice twice a week, if I can. 

It’s not necessary to run.

=

We’ve got time. We ____ run.