（01）用作不及物动词,意为“看,望,瞧”，和at连用，The teacher is looking seriously at us.老师正严肃地看着我们。
（02）和其它某些介词或副词连用， look after 照看,照料。如:He is old enough to look after himself.他年龄足够大,能照看自己。
（03）look for 寻找。如:I looked for you just now, but I didn’t find you.刚才我到处找你,但没有找到。look up抬头看;查;找出。如:He looked up and smiled at me.他抬起头,对我笑了笑。
（04）用作连系动词,意为“看起来”。后跟形容词，如:You look well/fine/healthy.你看起来很健康。The teacher looks happy. 老师看上去很高兴。She looks pale. 她面色苍白。后跟过去分词。如:You look tired; you’d better have a rest.你看上去很累,你最好休息一下。后跟名词，如:He looks a nice, honest man.他看上去是个诚实的好人。
