2. CAN, COULD and SHOULD
• We use can to express ability, possibility and
permission and to make requests.
• I can take pictures with my new mobile phone.
• We use could to express ability in the past, possibility
and to make requests.
• People couldn’t write text messages on old phones.
• We use should to give advice.
• We should leave a message on her voicemail.
3. Activity with can, could and should
Complete with the correct modal and answer:
1. …. you write a text message and talk at the
same time? Yes, I ….; no, I …..
2. …. you use a mobile phone when you were
ten years old? Yes, I ….; no, I …..
3. …. parents buy mobile phones for children
under 12? Yes, they ….; no, they …..
5. MUST, MUSTN’T and HAVE TO
• We use must and have to to express obligation.
• You must turn off your phone at the theatre.
• She has to do her homework.
• We use mustn’t to express prohibition.
• You mustn’t use your phone on aeroplanes.
6. Activity with must, mustn’t and have to
Complete with the correct form of must and have to.
1. You …. interrupt when someone is talking.
2. I .... Call home to say I’ll be late.
3. He …. Buy a new phone. This one’s good
enough.
4. Her phone isn’t working. She …. Take it to the
shop.
7. Answers
1. Mustn’t.
2. Have to.
3. Doesn´t have to.
4. Must.
8. MAY and MIGHT
• We use may to show possibility in the future, to ask
and give or deny permission in formal speech.
• I may have enough money for a headset.
• We use might to show possibility in the future.
• I might be late for my maths test.
9. Activity with may and might
Complete with the correct form of may or might.
1. You …. leave now if you wish.
2. They …. be away for the weekend but I’m not
sure.
3. You …. speak during the exam.
4. She …. not be in the bus. She …. be walking
home.
