put it down 与put down it 的区别,还有look it up和look up it的区别.

如果宾语是代词,就放在中间,如put it down,put them down.而是名词就放在后面,如put down your hand,put down the books.这两个其实是同样的道理,都是put sth down或put down sth ,look sth up 或look up sth...