Hello Tallulah
I'm sorry if we seem to be ganging up on you. Lively posts do tend to attract a lively response. But let's go back to the post that was deleted:
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MrX,
I refer you to your previous answer:-
"You have underlined objects, not subjects. (the first has no written subject: it is understood you)".
This did not explain that an object could be the subject of the sentence.
To help Anon.
If you ask yourself what is going on in the sentence " Take that off my chair"
Somebody is asking someone to take something off the chair. The something is the subject of the sentence.
The something is "that"
(I try to get balls into my discussions )
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When you say "an object could be the subject of the sentence", you're not "incorrect" in any general sense; but in grammatical terms, you're confusing "subject" as in "topic" with "subject" as in "grammatical subject of the sentence" (= "something of which something is predicated").
You're also confusing "object" as in "thing" with "object" as in the grammatical object of the verb.
A thing can certainly be the "topic" of a sentence; but the object of the verb can't also be the grammatical subject of the sentence.
In your sentence "Take that off my chair", for instance, the grammatical subject (i.e. the person performing the action described by the verb) is an unstated, understood "you"; while "that" is the direct object of the verb "take."
I hope that clears it up. It really isn't a case of power-crazed mods running amok with flailing gavels. All we do is pick up litter, direct people to the washrooms, and try to get between over-excited members when they start kicking hell out of each other.
(And if you've ever found yourself stuck between a couple of over-excited members, you'll know what that can be like.)
MrP