Intermediate grammar exercise: positive and negative forms of modal verbs
English grammar practice exercise, for intermediate learners.
In this exercise you will practise modal verbs in their positive and negative forms.
Instructions: Complete each sentence using one of the following modal verbs:
have to, don’t have to.
|Modal verbs: negative forms|
|can (used for possibility)
It can happen; everything's possible.
It can't happen; it's impossible.
|can (used for permission)
Can I smoke here? ∼ Yes, you can.
|can't (cannot), mustn't
You can't smoke here. You mustn't smoke here.
|can (used for ability)
I can play the guitar.
I can't play the guitar.
|must, have to (used for obligation)
You must be there at 8 o'clock.
You have to be there at 8 o'clock.
|don't have to, needn't
You don't have to be there at 8 o'clock.
You needn't be there at 8 o'clock.
|must (used for personal opinion, certainty)
He must be here somewhere – his car is outside.
He can't be here – his car's not outside.
|might, may (used for personal opinion, certainty)
He might/may be late today – there's a lot of traffic on the roads.
|may not, might not
He might/may not get here on time – there's a lot of traffic on the roads.
|should (used for weak obligation / advice)
You should stop smoking because it's unhealthy.
|shouldn't (should not)
You shouldn't smoke so much – it's unhealthy.