Learn the difference between Able vs Capable to improve your English grammar. While both adjectives seem similar, they have distinct structural rules and usages in daily English communication.
What is the Difference Between Able and Capable?
Understanding the exact nuances of Able vs Capable helps you write grammatically correct English sentences. Although both words express the idea of ability, they function differently in a sentence structure and govern different prepositions.
For more vocabulary comparisons like this, you can check out our guide on Warranty vs Guarantee to build stronger English writing skills.
When to Use Able in English Grammar
The adjective Able generally means having the power, skill, or financial means to do something. It is most commonly followed by an infinitive verb (to + verb).
- Structural Rule: Subject + be verb + able to + base verb.
- Example: I am not able to lift this heavy box.
When to Use Capable in English Grammar
The adjective Capable means having the capacity, ability, or qualification to do something. Unlike able, capable is typically followed by the preposition of and a gerund (-ing verb form), or it can describe someone who is highly competent.
- Structural Rule: Subject + be verb + capable of + verb-ing (or noun).
- Example 1: He is a capable leader.
- Example 2: This essay is capable of being translated.
Comparison Table: Able vs Capable
| Feature | Able | Capable |
|---|---|---|
| Meaning | সক্ষম (Having the skill/power) | যোগ্য (Having the qualification/capacity) |
| Following Preposition | Followed by to + verb | Followed by of + verb-ing |
| Example | I am able to swim. | He is capable of doing this. |
Key Takeaways
- Use able when pointing out direct physical or mental ability, followed by an infinitive (able to do).
- Use capable when discussing inherent qualification, capacity, or potential, followed by the preposition of (capable of doing).
- Mastering these grammar rules prevents awkward phrasing and boosts your fluency on english-grammarblog.blogspot.com.
Quick Practice Exercise
Test your understanding of Able vs Capable. Write your answers in the comments section below using these prompts:
- She is _____ (able/capable) of solving complex mathematical equations.
- Are you _____ (able/capable) to finish this report by tomorrow morning?
Frequently Asked Questions About Able vs Capable
Can able and capable be used interchangeably?
No, they cannot always replace one another because they require different grammatical structures. While able takes an infinitive (able to), capable takes a preposition (capable of).
Is "capable to" grammatically correct?
No, standard English grammar dictates that capable is followed by the preposition of, never to. Always use capable of doing instead of *capable to do.
Can capable describe a person's general competency?
Yes, capable can directly modify a noun to denote someone who is efficient and skilled, such as calling someone a capable worker or a capable leader.