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Prepositions after adjectives

Assertive in, about or with?

Assertive can combine with several prepositions depending on whether you mean a topic, a person, or a context.

Quick answer

Which preposition should follow assertive?

Use assertive about for topics and opinions, assertive with for interactions with people, and assertive in for situations or areas of activity.

assertive about her needs
assertive with clients
assertive in meetings

Choose the pattern by meaning

These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.

1
assertive about + topic/need

Expressing opinions or needs clearly

Use about to identify the subject someone speaks confidently about.

He is assertive about his boundaries.
She became assertive about pay discussions.
2
assertive with + person/group

Describing interaction with people

Use with for the people someone deals with confidently or firmly.

Managers should be assertive with customers.
She is assertive with her team.
3
assertive in + situation/area

Describing behaviour in a context

Use in for situations, settings, or fields where someone behaves assertively.

He is assertive in negotiations.
She became more assertive in class.

See the difference in context

The same subject can take different constructions because each sentence answers a different question.

Construction
Example
Meaning
assertive about
She is assertive about her goals.
About introduces the topic or issue.
assertive with
Be assertive with difficult clients.
With introduces the people involved.
assertive in
He is assertive in meetings.
In introduces the setting or activity.
assertive toward
She was assertive toward the committee.
Toward is also possible when focusing on direction of behaviour.

Common mistakes

Some combinations appear in real text but do not mean what learners often assume.

Using about for people

About is for topics, not usually for the people receiving the behaviour.

✕ assertive about customers ✓ assertive with customers

Using with for topics

With normally refers to people or groups.

✕ assertive with her opinions ✓ assertive about her opinions

Confusing in and with

In refers to a context or setting. With refers to interaction with people.

✕ assertive in her staff ✓ assertive with her staff

Quick practice

Choose the expression that matches the intended meaning.

1. She is assertive ___ her career goals.
2. Good supervisors are assertive ___ employees when necessary.
3. He became more assertive ___ meetings.

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Frequently asked questions

Can I say assertive about something?

Yes. It is common when talking about needs, rights, opinions, or goals.

When do we use assertive with?

Use it for interactions with people or groups, such as assertive with clients.

Is assertive in correct?

Yes. It is used for contexts or activities, such as assertive in discussions or in class.

abhorrent-to-in-for-of, about "ablaze with" or "ablaze in"? "able for" or "able in"? "abreast of" or "abreast with"? "absent from" or "absent in"? absolute in, for, of, to or as? "absurd to", "absurd in" or "absurd for"? abundant in, with, of, on or for? "abusive to", "abusive in" or "abusive towards"? "academic in" or "academic at"? "acceptable to" or "acceptable for"? accessible to, by, for, from or in?

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