All persons is correct, but rather formal or "legalistic." Perhaps most frequently used by grammarians referring to the first, second and third "persons" of a verb, it may seem stilted in informal speech when meaning "everyone."
Yes it is usage correct when writing in a sentence is forty-two story
Sheila and I is the correct grammatical usage in a sentence.
If I were her I would accept the blame. This is a conditional sentence, showing an impossible condition (If I were her). Were is used for all persons eg If he were you, if I were you, if you were me.
Correct usage is:If I were a volcano. Similar Usage:As if I were a volcano.I wish I were a volcano etc.
Yes, depending on how it is used in a sentence.
That sentence is not correct. The correct usage of grammer in the sentence is: The first ones in line for concert tickets were Jose and he.
Did you manage to finish your sentence?The correct usage would be "did you manage to finish?"
No it is not correct usage. Dawn is already referring to morning therefore you are saying morning twice. Stick with just dawn or just morning.
The sentence Let this promise remind you of his unfailing love is grammatically correct.
No, correct usage would be "...everyone is not the same"; as in, "Aren't you glad that everyone is not the same?".
My father didn't give my allowance for this week.
'You' can be used correctly in many contexts. I'm not sure what you are asking.