Can/ can't; could/couldn't

Provide an example of 'couldn't' in a sentence.

• I couldn't finish my homework yesterday.

• I can finish my homework tomorrow.

• I won't finish my homework today.

• I didn't finish my homework last week.

What does 'can' express in a sentence?

• Ability or possibility.

• A command or request.

• A future intention.

• A past action.

What does 'can't' indicate in a sentence?

• Ability to do something

• Willingness to do something

• Inability or impossibility

• Permission to do something

What is an example of a legal restriction using 'can't'?

• In my country, you can't drive until you are 18.

• You can't eat ice cream before dinner.

• You can't play video games on weekdays.

• You can't wear shoes inside the house.

What is the difference between 'can' and 'could'?

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

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

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

• 'Can' and 'could' are interchangeable with no difference.

Provide an example of 'can' in a sentence.

• I can swim very well.

• I will swim tomorrow.

• I swam yesterday.

• I am swimming now.

How do you form a negative sentence with 'can'?

• Add 'not' to 'can' to form 'can't'.

• Use 'never' before 'can'.

• Replace 'can' with 'cannot'.

• Add 'no' after 'can'.

What does 'could' express in a sentence?

• 'Could' expresses a future possibility.

• 'Could' expresses a command or request.

• 'Could' expresses past ability or a possibility.

• 'Could' expresses a certainty.

What does 'couldn't' indicate in a sentence?

• 'Couldn't' indicates future possibility.

• 'Couldn't' indicates present ability.

• 'Couldn't' indicates past inability or impossibility.

• 'Couldn't' indicates a suggestion.

In what context would you use 'could'?

• To express ability or possibility in the past.

• To indicate a future intention.

• To make a request in the present.

• To describe a habitual action in the present.