Yes.
Hi everyone is correct
No, correct usage would be "...everyone is not the same"; as in, "Aren't you glad that everyone is not the same?".
Everyone is cheerful.
The correct grammar is "everyone in your class has" because "everyone" is a singular pronoun and should take a singular verb ("has") to agree with it.
"Everyone is" is the correct version. Even though "everyone" refers to a large group of people, the word itself is singular, so it uses a the singular verb "is." For example, "everyone in the neighborhood is going to the block party" would be a correct sentence.
it often takes more than knowing the material to get the correct answer on a test
No, the correct form should be "Thanks to everyone who has already responded." since "everyone" is considered singular.
it often takes more than knowing the material to get the correct answer on a test
The correct phrase is "everyone wants." In English, "everyone" is a singular pronoun, so it takes the singular verb "wants." Therefore, the correct formulation is "Doesn't everyone want to be happy?"
How is everybody is correct. How is everyone? How are you? how are they? would be other correct ways to say this.
How is everybody is correct. How is everyone? How are you? how are they? would be other correct ways to say this.
No, that is not correct.The correct way of writing this phrase is good morning.It is two words, not one.For example:"Have a good morning everyone"."Good morning Bob, how are you?"