Modal Verbs for Advice and Rules

What are we learning today?

You will give advice, talk about possible danger and say what is forbidden or necessary.

Explanation

• After should, might and mustn't, use the verb without to.
• Should gives advice: You should wear a helmet.
• Might shows something is possible: You might burn your hand.
• Mustn't means it is forbidden.
• Need to means it is necessary: I need to rest.
• Don't have to means it is not necessary.

Examples

1. You should wear a helmet when you ride a bike.
2. You mustn't run on ice.
3. I need to rest.

Remember!

• Mustn't and don't have to are not the same.
• Do not add -s: he should, not "he shoulds".

Check yourself

1. Which word gives advice: should or mustn't?
2. Is "You should to rest" correct?