What do you do?.. Is the right expression here to ask about one's occupation. Never use what is your job? You are a teacher, that's great, me too a teacher.

What are.. Present tense. What were.. Past tense.

Are you a student? (correct usage) Because "A/An" mean one or any one (singulars) Students is a plural.. So, don't use a or an before such plurals.

Do is used with plural subjects and Does is used with singular subjects in the present simple tense. You do, I do, they do, we do but She does, he does, it does...

Reporting someone's words.. (statements, questions, Imperatives and exclamations) in our own words is reported speech. Ex My mother said, "I am preparing lunch".. Direct speech My mother said that she was preparing lunch. .. Reported

Both are wrong. Already I have eaten.

Cv is short from of curriculum vitae. Nothing but bio data.

I'm cool as Cook umber.

Why do you walk away? After questioning interrogative (wh-word) an auxiliary should be used. A way is completely different from away.

'About to' is used when something is going to happen. Ex: The train is about to leave the station. 'supposed to ' is used to express imagination. Ex : The project is supposed to be finished by the end of the month. ' to +verb ' is used to express purpose of some activity. Ex : I need a rubber to rub out the mistake.