A2 — Elementary+50 XP available

Interactive Grammar: Can and Be Able To

Compare 'can' and 'be able to' — understand when to use each for ability in present, past, and future contexts.

Grammar Explanation · Authentic Examples · Practice Exercises

Lesson progressNot started

Duration

~64 min

Exercises

Level

Elementary

Overview

Compare 'can' and 'be able to' — understand when to use each for ability in present, past, and future contexts.

Can vs. Be able to

presentShe can / is able to speak French.
pastHe could / was able to swim as a child.
futureShe will be able to drive after the lessons.
perfectHe has been able to manage teams since his promotion.

When to use each

Can/could = general ability or permission.
Was/were able to = succeeded on one specific occasion.
Be able to needed in tenses where 'can' doesn't exist (future, perfect, infinitive).
Formal writing often prefers be able to over 'can'.

Common Mistakes

❌ I will can finish. → ✅ I will be able to finish.
❌ She is able speak. → ✅ She is able to speak.
❌ He has can drive for years. → ✅ He has been able to drive for years.

When to use

Skills

She has been able to work remotely since 2020.

Formal writing

The team was able to meet the deadline.

Progress

He will be able to lead the project next year.

Language ability

I could speak Italian as a child.

Frequently Asked Questions

What does this lesson on modals cover?

Compare 'can' and 'be able to' — understand when to use each for ability in present, past, and future contexts.

Which CEFR level is this lesson designed for?

This lesson is designed for Elementary (A2) learners and forms part of the Modals section on Grammartier.

What is the best approach for studying this grammar topic?

Start with the definition, then study the examples carefully to understand how the pattern works in context. Practise identifying the structure in authentic sentences before producing your own — this recognition-first approach builds a strong foundation for accurate, confident use.