look加副词,构成的短语。常见的有look up,lopk down,look out,look back,look over……在这类由动词加副词构成的短语中,如果后面跟名词作宾语,名词可以放在副词之后,但如果是代词作宾语的话,代词要放在动词之后副词之前,不能把代词放在副词之后。