Relative Pronoun as Subject
Incorrect: I saw the man whom you said came here yesterday.
Correct : I saw the man who you said came here yesterday.
Note: In this sentence ‘who’ is the subject of the verb ‘came’. ‘You said’ is a parenthetic clause. However, in informal English ‘who’ can also be used as an object.
For example:
Who(m) do you want?
This is the boy who(m) you asked to come.
