Is your mother a doctor?这句话的开头为什么要用IS?

is your mother a policewoman? Is your mother a nurse? look!what___over there?a.does he do b.do they doc.are the twins doing d.is your father and mother doing单选写原因 Is your mother a teacher () a doctor? ( ) your friends playing football?No A.( ) your friends playing football?No A.areB.doC.is ()()your mother ()?She is a teacher . Does your mother is a teacher? Is your mother a nurse 是什么意思? Is your mother a nurse是什么意思 Your mother is a prostitute是什么意思 __?she is a nures.A.where does your mother do?B.what does your mother do?C.what is your mother doing?D.who is your mother? What is your mother what is your mother? Where is your mother? who is your mother Is your mother是什么意思 Is your mother thin? is your mother in