all of,all; both of,both他们分别有什么用法上的区别

all ,all of,both,both of的区别 (both,all)of her parents are doctors. all of,all; both of,both他们分别有什么用法上的区别 all 和all of的区别,both和both of的区别 both of which 与all of which的区别 Both of them 与 all of them要如何区分 She had two sons,__________became doctorsA.all of themB.all of whomC.both of themD.both of whom说明理由, both neither none either all neither nor both and either or.怎区别both both and both of all all of not all of neither none neither nor neither of either either or either of 怎样区别与运用 all of all of all of of all of all all of both of,all of,neither of,either of,none of怎么区分? I have two CD players,and-are broken.A.both of whichB.all of whichC.all of themD.both of theRTD.both of them did you break ( )windows A.the both B.both of C.both D.the the all of these,是用all还是both?为什么?怎么区别?