turn down the radio 和 go on the bus 里 为什么down是副词而on是介词呢?DOWN和ON后面加的格式不是一样的 the+n吗?

Turn down the ( )(cigarette/radio/tree) turn the radio down 和 turn down the radio都行吗 turn off the radio可以turn down吗 Turn down the radio,and the baby can sleep well.Turn down the radio,() the bady () sleep well.( ) ( ) turn down the radio,the bady ( )sleep well.( ) ( ) turn down the radio,the baby can`t sleep well. — Can you turn down the radio,please?—_______ ______(turn)down the radio;it's too noisy The radio is too l_____Could you turn it down? The radio is too( ).Could you turn it down? Must I turn down the radio now?No,you____ let's turn the radio down.your father is sleeping. Could you tell him ________(turn)the radio down? Turn down the radio 1.同意改写 2.把“the radio”改成代词 the radio,the baby is sleepingA turn down B turning down The radio is too loud.Will you please_____?A turn off it B turn down it turn on the radio Turn off the radio Would you mind _（turn）down the radWould you mind _（turn）down the radio,please? ( )the radio,please.the baby is sleeping nowA.not turn on B.don't turn on C.not turn down D.don't turn down