When do we use 'must' in English?
To express obligation, give orders and give advice
When do we use 'should' in English?
To give advice or make recommendations
When do we use 'could' in English?
To express possibility or past ability as well as to make suggestions and requests.
When do we use 'can' in English?
To express ability, possibility, to request or grant permission
When do we use 'may' in English?
To express possibility
When do we use 'might' in English?
To express possibility
Use 'must' in the sentence: She learns to drive. It will be very useful.
She must learn to drive. It will be very useful.
Sentence with 'can': Smoking causes cancer.
Smoking can cause cancer.
Sentence with 'have to': They clean the house.
They have to clean the house.
