CAN - COULD

How do you form a question using 'could'?

• By placing 'could' at the end of the sentence.

• By inverting the subject and 'could', e.g., 'Could you help me?'.

• By using 'could' as a statement without inversion.

• By adding 'do' before 'could', e.g., 'Do you could help me?'.

What is the negative form of 'could'?

• couldn't

• wouldn't

• shouldn't

• mightn't

What is the negative form of 'can'?

• cannot

• can not

• cann't

• won't

What is the primary use of 'can' in English grammar?

• To express ability, possibility, or permission.

• To indicate a future action.

• To show past tense.

• To form questions.

How do you express inability in the past using 'could'?

• Use 'could' to express ability in the past, e.g., 'I could swim when I was younger.'

• Use 'couldn't' to express inability in the past, e.g., 'I couldn't swim when I was younger.'

• Use 'didn't' to express inability in the past, e.g., 'I didn't swim when I was younger.'

• Use 'wasn't able to' to express inability in the past, e.g., 'I wasn't able to swim when I was younger.'

Provide an example of a polite request using 'could'.

• Could you please pass the salt?

• Can you pass the salt?

• Would you mind passing the salt?

• Pass the salt, please.

What is an example of using 'could' to express a hypothetical situation?

• If I had more time, I could travel more often.

• I could go to the party if I finish my homework.

• I could swim faster than anyone.

• If it rains, I could stay indoors.

What is the primary use of 'could' in English grammar?

• To express future intentions

• To express past ability, polite requests, or possibilities

• To indicate certainty in statements

• To form negative sentences

What is the difference between 'can' and 'could' when expressing ability?

• 'Can' refers to present ability, while 'could' refers to past ability.

• 'Can' is used for future ability, while 'could' is used for present ability.

• 'Can' and 'could' are interchangeable in all contexts.

• 'Can' refers to a hypothetical ability, while 'could' refers to a definite ability.

What is a common structure for asking about permission using 'can'?

• Can I [verb]? e.g., 'Can I leave early?'

• May I [verb]? e.g., 'May I leave early?'

• Could I [verb]? e.g., 'Could I leave early?'

• Should I [verb]? e.g., 'Should I leave early?'