Types of Noun & Use of Question Word

Use of 'ARE' and 'IS' depends upon the type of noun.
'ARE' is used for countable noun And for uncountable noun "IS" is used.
Use of these two articles is shown in the given table with suitable example by which you can understand it easily.

Some words are used to know about the person,place,things,feelings,ideas..etc.
All these words are called question words.
Such as to know about the person we use "what".
For example.....
What are you?
What class are you in?
What is your father?
What company are you in?

WHEN is used to know about time.
For example............
When will you come.
WHERE is use to know about the position. Like...WHERE do you live.