Are these showing the basic concept behind the basic "who" and "whom" distinction -- one is modifying the subject; whereas, the other is modifying the object?
The person who they think perpetrate the crime is not him.
Ply the same until they find someone whom they think has the other half.
Top answer
Hello Anon, 1. The person who they think perpetrated the crime is not him. 2.
— MrPedantic
Hello Anon, 1.
The person who they think perpetrated the crime is not him.
2.
Ply the same until they find someone whom they think has the other half .
In #1 you're correct: "who" is the subject of "perpetrated".
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