"Can" is a modal auxiliary verb that is used to express ability or possibility. Here are some common special problems that students may encounter when learning how to use "can" correctly:
Confusing "can" with "could": "Could" is the past tense of "can," and it is used to indicate past ability or possibility. Students may need to practice distinguishing between "can" and "could" in different tenses.
Using "can" with non-action verbs: "Can" is usually used with action verbs that express physical or mental ability. Students may need to learn which verbs can be used with "can" and which ones require different modal auxiliary verbs.
Negating "can" correctly: When negating "can," students need to use "cannot" or "can't" instead of "don't can." They may also need to learn the proper placement of "not" in relation to "can."
Using "can" in the right context: Students may need to learn when to use "can" to express ability and when to use other modal auxiliary verbs like "may" or "might" to express possibility or permission.
Here are some exercises to help students practice using "can" correctly:
- Choose the correct form of "can" to complete the sentences:
- She __________ speak three languages fluently. (can/could)
- They __________ play the piano very well. (can/could)
- We __________ see the stars clearly on a clear night. (can/could)
- I __________ not hear you very well, can you speak louder? (cannot/can't)
- Write sentences using "can" to express ability:
- He __________ run a mile in less than 6 minutes.
- They __________ swim across the lake easily.
- She __________ solve complex math problems quickly.
Answers:
- can, can, can, can't
- can
I hope these exercises help students practice using "can" correctly and address some of the special problems they may encounter.
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