how to determine [if] a interrogative pronoun is subject or subject complement It's relatively easy, actually, if you just make up an answer to the question (using a complete sentence). If the answer word ends up in the same place in the answer sentence as the question word in the question sentence (that is, at the beginning), then the question word is a subject. If the answer word ends up in a different place in the sentence than the beginning, then the question word is a subject complement.
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how to determine [if] a interrogative pronoun is subject or subject complementIt's relatively easy, actually, if you just make up an answer to the question (using a complete sentence).