to form questions with when,where,why,and how,we use these pattern.
question word +auxiliary (do,have,etc) +subject +verb
when does the film start?
question word + be+ subject
when was the exam?
to form question with which and whose ,we use this pattern:
which /whose +noun+ auxiliary/be
which course is he taking?
whose coat is this?
we can also use a noun with what , with the same meaning as which:
what/which sports do you play?
we use when to ask about time .
we use where to ask bout places.
we use why to ask for a reason.
we use how to ask about a process or a series of actions or events that produce a certain result.
we use which or what with a plural noun to ask someone to specify when there are a number of possibilities .
Ex: which countries in Europe have you been to ? Italy, Spain , Germany.
we use whose to ask who owns something:
whose hat is this?
we use what to ask about things or actions .
we use who to ask about people.