Please, could you explain me the difference between 'As' and 'Like'?
Use like before a noun, as in 'She's very like her mother'. Where a clause follows, you should use as or as if, e.g. 'He's behaving as if he owns the place' (not 'like he owns'), or 'You don't know him as I do' (not 'like I do').
We use As when we speak about an action. As you do.
And we use Like when we speak about physical resemblance. She looks like her mother.
Basically, if a subject and verb are to follow, use "as." If a single word follows, use "like."
I am going to talk to you now as your father.... (in my role as your father);
I am going to talk to you now like your father.... (in the same way as your father).
"As" links a whole clause to the rest of the sentence and "like" links a noun or pronoun.
The students thought that the professor was acting like a child.
The students thought that the professor was acting as a child does.