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Answer: A simple subject tells us who or what the subject is in the sentence Wait by the classroom door the subject is door.
The simple subject in the given sentence is Door.
What is Subject?
The term "subject" refers to the person conducting the action. The subject is the part of the sentence that usually occurs at the beginning and tells the reader who is doing the action and what it is about.
Generally, a sentence has the subject along with the object. The best way to identify a sentence's subject is to transform it into a yes-or-no question, where "yes" or "no" is the only acceptable response.
Simple subject refers to the subject present in the sentence in the form of the noun and pronoun. The opposite of simple subject is complete subject, which is the main subject or modifier of the noun.
Therefore, it can be concluded that Door is the simple subject in the sentence.
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