There actually isn't a simple subject in this sentence because it is an instruction. The simple subject is actually 'you' as in 'You do your chores.' but it has been removed. The sentence is still completely grammatically correct, of course.
The simple subject of the sentence is "you".
Yes, a pronoun can be a simple subject in a sentence. A simple subject is the main noun or pronoun that the sentence is about, and it can be a pronoun like "he," "she," "it," or "they."
The simple subject in the sentence is "Natives."
A simple subject is a thing. If it were talking about a Baseball or a sentence the baseball is the simple subject.
The simple subject in the sentence "Did you find your wallet" is "you."
The simple subject in the sentence is "Cherokee."
we
The simple subject in the sentence is "plane."
The simple subject in the sentence is "week." It is the noun that the sentence is mainly about.
The simple subject in the sentence is "Cherokee." It is the main noun that the sentence is talking about.
the simple subject of a sentence is what the sentence is in one word
"They" is the subject of that sentence.