一般用take it away,it作为代词放中间,如 put it up,turn it off,但是具体名词就放在后面了,如turn off the light,take away the desk.再清楚一点，我懂了再加5点不必要记那么复杂，就记代词（it，them）放中间，名词放后面。或者记具体例子：pick it/them up，pick up the papers他们的区别意思上没有区别的