In this module, you will study modal verbs, which are auxiliary verbs used to express meanings such as ability, possibility, permission, obligation, advice, and probability.
Modal verbs are an important part of English grammar because they allow speakers and writers to express attitude, certainty, necessity, and intention rather than simply describing actions.
Unlike main verbs, modal verbs:
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do not change form for different subjects
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are followed by the base form of the main verb
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do not require auxiliary verbs such as “do” in questions and negatives
For example:
She can solve the problem.
You must follow the instructions.
They might arrive later.
In each case, the modal verb adds meaning related to ability, obligation, or possibility.
By the end of this module, you will be able to:
✅ recognise the main modal verbs in English
✅ understand how modal verbs express different meanings
✅ use modal verbs correctly in affirmative, negative, and interrogative sentences
✅ distinguish between similar modal meanings such as must vs have to or may vs might
✅ avoid common grammatical errors involving modal verbs
Lessons in This Module
| Lesson | Topic |
|---|---|
| Lesson 1️⃣ | Introduction to Modal Verbs |
| Lesson 2️⃣ | Ability and Possibility (Can, Could, May, Might) |
| Lesson 3️⃣ | Obligation and Necessity (Must, Have to, Had to) |
| Lesson 4️⃣ | Advice and Suggestion (Should, Ought to) |
| Lesson 5️⃣ | Degrees of Certainty and Probability |
| Lesson 6️⃣ | Modal Structures in Questions, Negatives, and Polite Requests |
| Lesson 7️⃣ | Common Modal Errors |
Why This Module Matters
Modal verbs help speakers express subtle meanings such as certainty, politeness, obligation, or possibility.
Compare the following sentences:
She solves the problem.
She can solve the problem.
The second sentence expresses ability, which is conveyed through the modal verb can.
Similarly:
You leave early.
You must leave early.
The modal verb must expresses strong obligation.
Understanding modal verbs allows learners to communicate more precisely and appropriately in different contexts.