have a look和have a look at的区别

Look是一个不及物动词,如果后面跟宾语的时候,要加介词at,后面没有宾语的时候就不用介词.比如：I have a beautiful picture.Please have a look(at it).
have a look at后面要加宾语
have a look一般放在句尾,后面什么也不加,后面加上at这个介词后,一定要再跟一个介词宾语.
I just have a look。我就看一看。
I just have a look at these shoes.
我就是看一下这些鞋子。

have a look 的用法和动词look的用法相似。我们知道，look是一个不及物动词，如果后面跟宾语的时候，要加介词at,后面没有宾语的时候就不用介词。
比如：I have a beautiful picture.Please have a look(at it).

have a look是基本结构，瞧一瞧的意思。后面加上at这个介词后，一定要再跟一个介词宾语。
Come in to have a look,please!
I want to have a look at the picture.

have
a
look
at
sth/sb
看看什么东西或人
have
a
look=take
a
look
随便看看.
have
a
look
at后面要加宾语
have
a
look一般放在句尾,后面什么也不加
而look就是单纯的动词了。

做动词用时，look是连续性动作的动词，是看着的意思
作名词用时，是指看一眼，看一看。
老师叫看黑板，意思是叫看着黑板，所以要用look
at
the
blackboard.