Student or Learner
Could you please let me know what the general rule is for using "the" before the first noun in the following structure?
Noun1 +of+ Noun2
When we should use "The" before the "Noun1"?
When we should not use "The" before the "Noun1"?
I have tried to find the rule by practice but still I get confused. For example I have seen both "the head of the department" and "head of the department"