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What modal verb do we use in this situation?
When do we use this modal verb?
Choose between modal verbs
Complete the sentence
100

We want to talk about a rule or an obligation (positive sentences).

Must, should
Have to, need to

100

Can / can't

We use can/can't to talk about abilities or permission.

100

You SHOULD/CAN'T review modal verbs before your test tomorrow.

should (or must)

100

I ______ study a lot because I have a very important exam tomorrow.

must
should
have to
need to

200

We want to talk about a rule or a prohibition (negative sentences).

Must not, should not
(+ can't)

200

Don't have to

We use "don't have to" when we have a choice!

200

You MUST/CAN'T use mobile phones during the Cambridge Exams.

Can't (or Must NOT!)

200

You ______ attend social club every Sunday. 

don't have to