Yes, but it would make more sense saying 'The boy didn't want any of the carrot cake'.
I will eat cake until there is none left!!
no
The correct form of this sentence would be "none of you are". This is because "you" in this context is plural in the case of "you all" so "are" would be the appropriate verb here.
Yes, the sentence "Is they wanted some more but there was none left" is complex. It contains multiple clauses: the main clause "there was none left" and the subordinate clause "they wanted some more." This combination of ideas makes it more intricate than a simple sentence with one subject and verb. However, there's a grammatical error in the beginning; it should be "If they wanted some more."
Please correct me if I misunderstand you, but I believe your answer is 'none'.
Adverbs normally end in '-ly' so if we added '-ly' to correct, the adverb for correct is correctly.
There are none in eating cake.
"None of you are" is correct. "None" is treated as a plural pronoun, so it should be followed by a plural verb.
Has. 'None' = 'no one', so 'none has' = 'no one has'.
None of them have opened their books - if each or every one of them have their own books. None of them has opened his book - if all of them only use one book (which incidentally belongs to a male =P) - You would need to change "have" to "has" to reflect the singular.
None of the men were going home. The verb were refers back to the simple subject men. Men were not men was. man was men were
None, it's a sponge cake because it feels spongy