In agreement is the standard expression for sharing the same opinion or decision. Of agreement is not a normal fixed combination in current English.
Use in agreement to mean that people have the same opinion or accept the same decision. The phrase of agreement is generally nonstandard as a fixed expression, though of can appear in longer noun phrases such as terms of agreement.
These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.
Use in agreement with someone to show shared views or support.
Use on before the topic or issue people agree about.
Use reach an agreement for successful negotiation or discussion.
Of agreement can appear inside a larger noun phrase such as terms of agreement, where of links two nouns.
The same subject can take different constructions because each sentence answers a different question.
Some combinations appear in real text but do not mean what learners often assume.
English normally uses in agreement, not of agreement, for shared opinions.
✕ They were of agreement. ✓ They were in agreement.Use on for topics and with for people or opinions.
✕ We are in agreement with the budget. ✓ We are in agreement on the budget.Agreement often needs an article in countable uses.
✕ They reached agreement yesterday. ✓ They reached an agreement yesterday.Choose the expression that matches the intended meaning.
Paste the complete sentence below. Linguix checks the preposition together with grammar, spelling, punctuation, and style.
It can appear inside larger noun phrases such as terms of agreement, but not usually as a fixed expression by itself.
Yes. In agreement with someone means you share the same opinion.
Agreement on refers to a topic or issue, while agreement with refers to a person, opinion, or idea.
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