【1】动词+副词:构成短语动词,宾语可以放在中间,也可以放在后面。put on 穿上,turn on 打开? 为动词+副词Please put on your clothes.=Please put your clothes on.请穿上你的衣服。【2】动词+介词:构成短语动词,宾语只能放在介词后面。look after 照顾;照看; look for 寻找,为动词+介词Tom had to look after his younger brother at home.汤姆不得不在家里照顾他的小弟弟。