怎样判断动介还是动副？如果介词放在后面符合语法的就是介词，如果介词必须放在中间就是动副。比如：care about 的代词必须放在后面才对，care about it, 类似的还有;, look after, think of , think about, look at, remind of, learn from,belong to, take after,ask for 等。这就是动介短语。但是像以下这些词组就必须把代词放在中间的，就是动副短语了：pick out, take away, put off, hand out, use up, think over, wake up, write down, put up, call up 等， pick it out, take them away...