Hi , Hela.
Example 1: I have been looking for you everywhere.
Form: 1st person singular, subject pronoun
"have been looking"
Form: present perfect continious verb
Form: verb + preposition
Function: part of the present perfect continious form "have been"
Note, look means to appear (e.g., Max looks tired), whereas look for means to search. (e.g., Let's look for Max.)
Form: prepositional phrase
Function: object of "looking"
Form: 2nd person singular, object pronoun
Function: adverb of location/place
Example 2: The building opposite our school is being pulled down.
They are going to pull down the building ~ They are going to pull the building down (to the ground).
Form: preposition (e.g., pull down the shade ~ pull the shade down)