turn it off 为什么写成turn off it 就错了?

turn it off 为什么写成turn off it 就错了? turn it off为什么不能写成turn off it 为什么是turn off the TV 不是turn the TV off?而有turn it off? turn off it还是 trun it off turn it off的意思 Turn it off again.是什么意思? 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 on it和turn it on;turn it off;turn off it用法 how to do it turn it off 与turn it down,的区别 -_____is watching TV .Turn it off please. 关于turn off it 与turn it off哪个才是正确的 turn off