take a look 是一个固定搭配。
例如: what is this ,let me take a look. 这是什么啊,让我看一下。
take a look at 后面一定有宾语,就是后面一定有有,要看的是什么。 意思是,让我看一下....后面要接一下词。
例如:what is this,let me take a look at it . 这是什么啊,让我看一下它。
May I take a message?
Can you come to my party?
Can I come to your party on February 21st?