Yes.
"you are with us people"
AND
"we are people"
so...
"we people"
NOT
"us people"
The second one is more correct.
Yes. The form who is the nominative, as opposed to whom.
yes it is a real word. It is also correct grammatically and more stupid is not correct.
It may be grammatically correct, but it is a logical absurdity. more/fewer is about counting more/less is about amount … so… no, it is not correct.
Either is correct, but the term "this list" is another usable form. (More common is "the list below" rather than "the below list".)
The phrase "how don't I" is not grammatically correct. A more correct way to phrase it would be "why don't I."
No, "you is" is not grammatically correct. The correct form is "you are" when referring to more than one person or "you are" when referring to one person.
No.
It's grammatically correct but slightly peculiar. It would be more normal to say something like "I am completing the work now" or "I will complete the work now" rather than "I complete the work now".
No, "most friendly" is not grammatically correct. The correct form would be "friendliest" when comparing three or more things.
Yes
The second one is more correct.
Yes, "is much more easily" is grammatically correct because it follows the correct order of adverbs (much, more, easily) when comparing multiple items or degrees in a sentence.
Both "you and he" and "he and you" are grammatically correct, but "you and he" is more commonly used in English.
No, the sentence "Is Us teens need more sleep" is not grammatically correct. It would be more correct to say "Do US teens need more sleep?" to form a grammatically correct question.
Both sentences are grammatically correct, but the second one is more concise and direct in conveying the same message.
It doesn't look grammatically correct, but not everything that is correct looks that way. When you break the sentence apart, there is nothing missing. It has a subject and a predicate. Although "You are the winner" may be more appealing to most people, I do not believe there is anything grammatically incorrect with your example, as ugly as it may sound. It is correct. You can be be a subject or an object pronoun. subject - You are the winner! object - The winner is you!