主句是happy is the man,其中,
the man：主語；
is系動詞作謂語；
happy：表語；
to whom it is granted to make even one such discovery是定語從句,修飾the man.在定語從句中,
it：主語；
is granted to：謂語（被動語態(tài)）；
whom：賓語；
to make even one such discovery：目的狀語
不明白的再問喲!請記得采納,多謝!