Question

改一般疑问句,什么,时候用is,什么时候用do,does,提问?

Answer 1

句中有谓语动词的话就要用do,does，作为助动词；句中宾语是形容词或名词的话就要is
are，作为系动词。当句子主语是第三人称时，助动词(do)就要用三单形式does，系动词(is,are)就要用is。另外，当句中主语是单数的话，系动词也要用is。
当主语是you的时候，提问也用are还有时态问题。如果是过去式
那提问的时候也要用过去式。
如he
is
a
boy-----------------is
he
a
boy?
he是三单，所以用is
they
are
boys.-----------are
they
boys?
they
是复数，所以用areyou
are
a
teacher----=are
you
a
teacher?
you
是第二人称
用are
he
eats
meat.---------does
he
eat
meat?
eat是谓语动词，所以要用助动词do，因为he
是三单，所以用does
they
eat
meat.------do
they
eat
meat?
eat是谓语动词，所以用助动词do，因为they
是复数，所以就不用does，仍旧用do
he
was
a
student-----------------was
he
a
student?
was
是过去式，提问也用washe
ate
meat.---------did
he
eat
meat?
ate是eat的过去式，提问同did（do的过去式）you
were
a
teacher
that
moment.---------were
you
a
teacher
that
moment?
时态一定要先确定好。