2. What is can and must
Can and Must are (like ‘Will’)
modal verbs
3. How to use can and must
Must – used when it is required or mandatory to
do something in such a way.
Can – used when one is able or needs
permission to do something in such a way.
4. Affirmative, negative and
interrogative (Must)
Affirmative Negative Interrogative
Long Form Short Form
I must I must not I mustn't Must I...?
You must You must not You mustn't Must you...?
He must He must not He mustn't Must he...?
She must She must not She mustn't Must she...?
It must It must not It mustn't Must it...?
We must We must not We mustn't Must we...?
You must You must not You mustn't Must you...?
They must They must not They mustn't Must they...?
Short answers Must you dance? Yes, I must. /No, I mustn't.
6. Some more examples
I can eat more vegetables.
(Eu posso comer mais vegetais).
I must eat more vegetables.
(Eu tenho de comer mais vegetais).
I can’t eat more vegetables.
(Eu não posso/consigo comer mais vegetais).
I mustn’t eat more vegetables.
(Eu não posso/devo comer mais vegetais).
Can I eat more vegetables, please?
(Posso comer mais vegetais, por favor?)
Must I eat more vegetables?
(Tenho de comer mais vegetais?)
7. Can, must and sports
1. Clube Nacional de Benguela can’t beat
Atlético Petróleos de Luanda.
2. Floyd Mayweather must fight against
Manny Pacquiao.
3. Usain Bolt can beat the world record.
4. Alberto Contador mustn’t doubt his
abilities.
