she is your mother. she isn’t your mother
she likes playing football. she doesn’t like playing football.
she is your mother. Is she your mother?
she likes playing football. Does she like playing football?
1.对人提问用who,she is your sister.Who is your sister?
2.对事物用what, The book is on the desk. what it is on the desk?
3对时间用when, She will come back tomorrow.When she will come back?
4.对频率用how often等等I play football everyday.How often does you play footall?