call on

formally ask someone to do something, especially to speak

B2

What does "call on sb" mean?

To 'call on' someone in this sense means to formally invite or ask them to speak or take action, typically in a public or official setting. This happens when a person in authority — such as a teacher, chairperson, judge, or moderator — selects someone from a group to contribute. A teacher calling on a student in class, or a meeting chair calling on a delegate to present their report, are classic examples. It often appears with a following infinitive ('called on her to explain'), which signals what the person is being asked to do. The tone is neutral to formal, and it is especially common in educational, professional, and official contexts.

Examples

How to use it

call on + person

The most common structure: someone in authority selects a person to speak or act. The object always follows 'on' directly.

The moderator called on the delegate from Brazil to present her proposal.

call on + person + to-infinitive

Use this pattern to specify what the person is being asked to do, which is very natural with this phrasal verb.

The judge called on the witness to describe what he had seen.

be called on + to-infinitive

The passive is natural and common when the focus is on the person asked rather than who is doing the asking.

She was called on to give a short introduction before the panel discussion began.

call on + pronoun

Pronouns always follow 'on' — they are never placed between 'call' and 'on'.

There were ten hands raised, but the teacher only called on three of them.

Common Collocations

call on a studentcall on the next speakercall on someone to explaincall on volunteerscall on the witnesscall on members

Common Mistakes

Separating the verb and particle

This phrasal verb is inseparable, so the person being called on must always come after 'on'. Never insert a noun or pronoun between 'call' and 'on'.

✗ The teacher called me on to answer the question.
✓ The teacher called on me to answer the question.
Confusing the 'formally ask' sense with the 'visit' sense

"Call on" can also mean to visit someone, which can cause confusion. The 'formally ask' sense usually appears in a public or official context and often includes a following infinitive. If neither of those signals is present, the sentence may be read as referring to a visit instead.

✗ I called on the director (intending: I formally asked the director to speak, but without context it reads as a personal visit).
✓ The chair called on the director to summarise the results for the board.
Using 'call for' instead of 'call on'

'Call for' takes an action or thing as its object ('call for reform'), while 'call on' takes a person. Using 'call for' when you mean to invite someone to speak produces a different meaning.

✗ The chairperson called for the next speaker to present their findings.
✓ The chairperson called on the next speaker to present their findings.

Usage

This sense of 'call on' is neutral to formal and is especially common in classrooms, meetings, and official proceedings. 'Call upon' is a more formal, ceremonial variant with the same meaning.

Frequently Asked Questions

Does 'call on' always need an infinitive after the person, like 'to speak' or 'to explain'?

No, the infinitive is optional. You can say 'The teacher called on Marcus' without adding what he was asked to do, and it still makes sense in context. However, adding a to-infinitive ('called on Marcus to answer') makes the meaning more complete and is very common, especially in formal or written contexts.

Is 'call upon' the same as 'call on'? Can I use them interchangeably?

'Call upon' shares the same meaning but has a more formal, ceremonial tone. In a business meeting or classroom, 'call on' is the natural choice. 'Call upon' tends to appear in speeches, official documents, or ceremonial proceedings, where a more elevated style is expected.

Can 'call on' be used in the passive, and is it natural?

Yes, the passive is both correct and very common with this phrasal verb. It's particularly useful when you want to focus on the person who was asked to speak rather than who asked them. For example: 'Several experts were called on to testify before the committee.'

Is 'call on' used mostly in British or American English?

It's used in both British and American English without a strong regional preference. The classroom setting — where a teacher 'calls on' a student — is especially familiar in American English, but the phrase is understood and used naturally on both sides of the Atlantic.

What kinds of people or situations typically involve 'call on'?

The phrasal verb almost always involves someone in a position of authority — a teacher, chairperson, judge, moderator, or event host — who selects another person from a group to speak or act. Classrooms, formal meetings, debates, courtrooms, and public ceremonies are the most typical settings.

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