Can, Could, Be Able To are essential modal verbs used to express different degrees of ability and possibility in English. Mastering their usage allows you to convey precise meanings and adapt your language to various contexts and levels of formality.
Examples
Example 1
IncorrectShe can to play the piano well.
BetterShe can play the piano well.
"Can" is followed directly by the base form of the verb without "to".
Example 2
IncorrectHe could to read by the age of five.
BetterHe could read by the age of five.
"Could" is followed directly by the base form of the verb without "to".
How It Works
Meaning
"Can", "Could", and "Be Able To" are modal verbs used to express ability and possibility. "Can" indicates present ability, "Could" is used for past ability or polite requests, and "Be Able To" is versatile across tenses to show ability. At the B2 level, mastering these forms helps you accurately express different degrees of ability and adapt to various contexts.
Use it when
- Expressing present ability or possibility with "Can".
- Indicating past ability or making polite requests with "Could".
- Using "Be Able To" for future abilities or when a specific tense is needed.
- Formally expressing ability in academic writing or exams.
- Conveying nuanced meanings in professional or formal settings.
See it
Quick rules
- Use "Can" for present ability or informal requests.
- Use "Could" for past ability or polite requests.
- Use "Be Able To" for tense precision across different time frames.
- "Could" is often more polite than "Can" in requests.
- "Be Able To" can replace "Can" or "Could" when specific tense usage is necessary.
Common Mistakes
Common problem 1
using "to" after "can" or "could"
WeakShe can to swim very fast.
StrongShe can swim very fast.
Fix: Remove "to" after "can" or "could".
Common problem 2
using "be able to" incorrectly
WeakHe was able to can fix the car.
StrongHe was able to fix the car.
Fix: Use "be able to" without "can" or "could".
Common problem 3
confusing "could" with "can" for past ability
WeakShe can read when she was three.
StrongShe could read when she was three.
Fix: Use "could" for past abilities.
Practice Lab
Practice
Choose the correct form of "Can", "Could", or "Be Able To" to express ability accurately.
Score: 0/3
Focus on the context to choose the right form of ability.
1. Quick pick
Choose the correct sentence for past ability.
2. Build it
Put this "Be Able To" sentence in the correct order.
Tap a chunk to move it down. Tap it again to send it back.
3. Final sort
Sort each sentence as correct or needing a fix.
She can play the guitar.
She can to play the guitar.
Why It Matters
🎯 Why it matters: Correctly using "Can", "Could", and "Be Able To" ensures your message is clear and accurately reflects your intended meaning, enhancing both your written and spoken communication for more effective and nuanced expression.
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