Modal auxiliary verbs help us express ideas such as ability, permission, possibility, advice, obligation, and certainty. These verbs work with main verbs to add meaning and show the speaker’s intention or attitude.
In this article, students will learn how modal auxiliaries function in different contexts and how their meanings change depending on the situation.
Read the following conversation and observe the use of the highlighted words:

Here, words like 'might', 'can', 'should', and 'could', which indicate different degrees of certainty or obligatory actions about rain, are called 'modal verbs' or 'modal auxiliaries'.
We use modal verbs when we want to:
Instead of saying “You go home”, we say:
Modal verbs are best understood through their functions. The same modal can express different meanings depending on the context.
Used to describe what someone is capable of doing.
Modals used: can, could
Examples:
Used to express that something may or is likely to happen.
Modals used: can, could, may, might, would
Examples:
Used to suggest an idea or recommend a course of action.
Modals used: could, shall
Examples:
Used to seek or grant approval to do something.
Modals used: can, could, may
Examples:
Used to show that something is not allowed.
Modals used: mustn’t, should never
Examples:
Used to talk about decisions or events in the future.
Modal used: will
Example:
Used to indicate how likely something is to happen.
Modals used: may, might, would, will, must
Examples:
Used to offer help, services, or something to someone.
Modals used: shall, will,
Examples:
Used to express duty or responsibility.
Modals used: must, should
Examples:
Used to ask someone to do something, often politely.
Modals used: can, could, would
Examples:
Used to show that something is required or essential.
Modals used: must, have to, has to
Examples:
Used to guide or recommend what someone should do.
Modals used: should, must
Examples:
1. Using the wrong verb form after a modal
Wrong: She might goes to school.
Right: She might go to school.
2. Using more than one modal in a sentence
Wrong: He will must complete the task.
Right: He must complete the task.
3. Incorrect negative structure
Wrong: She not can attend the meeting.
Right: She cannot attend the meeting.
4. Confusing levels of certainty
Wrong: It might definitely happen.
Right: It will definitely happen.
1. Match the sentences in column A with the functions of the modals used in column B:
|
A |
B |
|
1. It might be difficult to find a taxi during peak hours. |
a. asking for permission |
|
2. Could you please hand me the scissors? |
b. ability |
|
3. May I leave a few minutes before the break? |
c. offer |
|
4. Rajeev says that he can swim well, even in cold water. |
d. strong obligation |
|
5. You should not sit with your back crouched. |
e. future action |
|
6. Shall I buy you lunch today? |
f. probability |
|
7. Everyone must carry their identity cards. |
g. advice |
|
8. I will be in Ahmedabad tomorrow. |
h. polite request |
2. Fill in the blanks with the correct modals. There may be more than one answer.
(can, might, should, will, would)
3. Re-write the following sentences using modals without changing the meaning of the sentences. One has been done for you.
a) I suggest that the patient goes to a good doctor!
The patient should go to a good doctor.
b) I think a bachelor’s degree is necessary for this job.
You .........................................................................................................
c) Perhaps your friend will pick you up from the airport.
Your friend ...............................................................................................
d) Eating is not allowed in the class!
You .........................................................................................................
e) Probably, the government will declare a holiday tomorrow.
The government .........................................................................................
Modal auxiliary verbs are helping verbs that express ideas such as ability, permission, possibility, obligation, or advice. They are always used with the base form of the main verb to add meaning to a sentence.
Some common modal verbs include can, could, may, might, must, shall, should, will, would, and ought to. Each of these is used to express different functions like ability, suggestion, or certainty.
No, modal verbs cannot be used alone. They must always be followed by a main verb in its base form to complete the meaning of the sentence.
Both may and might are used to express possibility. However, might is used when the possibility is less certain compared to may.
Negative sentences are formed by adding not after the modal verb. For example: cannot, should not, must not. These forms help express prohibition, advice, or lack of possibility.
No, only one modal verb should be used in a sentence at a time. Using more than one modal can make the sentence grammatically incorrect.
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