Question

what kind of sentence if u do not go to work u might get fired compound or simple

Answer 1

I assume the sentence is: "If you do not go to work, you might get fired."
This is a compound sentence because it connects two simple sentences using "if"

Answer 2

yes i agree

Answer 3

I disagree;
http://www2.ivcc.edu/rambo/eng1001/sentences.htm
Use of "if" means that one of the sentence clauses depends on the first half of the sentance (the independant part). What this is is a "Complex" sentence (see the link).
An compound sentence can illustrated by joining two simple sentence by a coordinating conjunction. Eg:
It is raining today, and my window is leaking.