为什么是turn off the TV 不是turn the TV off?而有turn it off?

为什么是turn off the TV 不是turn the TV off?而有turn it off? 为什么是turn it down 不是turn down it,但是又是turn off the TV不是turn th Turn off the TV改为否定句 Turn off the TV.改为否定句 ---Must we turn off the TV now? could (someone) please turn off the tv _______ is watching the TV.Turn it off,will you? Turn off the TV.( I asked you to turn off the TV. -_____is watching TV .Turn it off please. My TV-Turn-off Week Don't forget to turn off the TV.=Remember to ( ) off the TV. Turn off the TV ______ I can study,