1.疑问代词做对陈述句的主语,宾语或定语提问,即做句子的主语,宾语或定语,如what,who/ whom,whose ,which
eg.Who is talking What can you see?
Whose shirt is this?
2.疑问副词对时间,地点,方式等状语提问,如when,where,how,why等.
eg.When is your birthday?Where are you going?
How do you know?