1.Look 是一个动词,相当于汉语中的 看啊! 2.Look at 是一个词组,look这里是动词。加了一个介词,就是看得有东西 eg: Look,here comes the bus.Look,there is a house. eg:Look at the blackboard,please. Look at the sky.
(当look at 后面是一个副词 如 here there 时,at 不能加)
Have a look 是一个词组 look这里是一个名词,顾名思义,来个看,就是看一眼,看一看的意思。 Could I have a look? Let`s have a look. 我能不能看看? 让我看看