look 作实义动词是不及物动词,可以单用,当“看”讲.例如Look!The boys are playing soccer.
如果带宾语,要加介词.例如look at look for look after look over 等
look做系动词,当“看起来”讲,后面接形容词.例如 He looks tired 他看起来很累
也可以用look like +名词 The hat looks likes a cat.这顶帽子看起来像一只猫.