“For exam” can be correct in expressions such as “study for an exam.” “Of exam” is usually not idiomatic in modern English unless “of” belongs to a larger structure.
Use “for” when preparing for or intended for an exam: “study for an exam.” “Of exam” is generally not a natural standalone combination. Instead, English usually uses “exam of,” “exam in,” or “exam on” depending on meaning.
These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.
Use “for” with verbs about preparation, readiness, or purpose.
Use “in” to name the academic subject being tested.
Use “on” for the particular content covered by the test.
“Exam of” appears mainly when “exam” means inspection, medical examination, or analysis.
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 does not use “of exam” by itself.
✕ I am nervous of exam ✓ I am nervous about the exam“For” usually connects to preparation, not directly to the noun “exam.”
✕ the exam for biology was hard ✓ the exam in biology was hardUse “in” for subjects and “on” for specific topics.
✕ an exam on chemistry ✓ an exam in chemistryChoose the expression that matches the intended meaning.
Paste the complete sentence below. Linguix checks the preposition together with grammar, spelling, punctuation, and style.
Usually no. English normally uses other structures such as “exam in,” “exam on,” or “study for an exam.”
It is correct when “for” shows purpose or preparation, as in “prepare for an exam.”
“Exam in” names a subject area, while “exam on” names a specific topic or unit.
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