Question

ENGLISH！！

•The boy you met this morning is Takashi.
•The boy that you met this morning is Takashi.

In the relative pronoun sentence, why is that instead of who?
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Answer 1

When writing a restrictive clause, introduce it with the word "that" and no comma. However, if the subject is or was a human being, use "who" to introduce the clause. When talking about people in defining (restrictive) relative clauses, who is preferred to that.