We can use prepostions with the adjective clauses.

These prepositions can be BEFORE the clause or at the END of the sentence.

TO… FOR…

He is the man TO WHOM you should talk to

This disco is the place TO WHICH I want to go to.

This is the restaurant FOR WHICH John works

Some adjectives clauses have the pattern:

QUANTIFIER + FOR + ADJECTIVE CLAUSE (WHOM, WHICH, WHOSE)

ALL OF MOST OF A NUMBER

OF SOME OF A FEW OF SEVERAL OF A COUPLE

OF TWO OF

I have friends ALL OF WHO came to the party

The movies MOST OF WHICH I watched were great.

I have some books A NUMBER OF WHICH I have read already

I visited a lot of place SOME OF WHICH had great legends

That is the teacher, TWO OF WHOSE students did not pass

These clauses refer ONLY to things It is formed by: NOUN + OF + WHICH Harry Potter, AN IDEA OF WHICH

books kids should read, was great.