I forgot to include these very last 2 sentences. I hope you can have a look at them, too. (I included a few phrases on grammmar, too).

1) The story is profoundly allegorical and it can be interpreted as a 19-th century version of the myth of Faust, who sells his soul to the devil in order to satisfy all his desires. (in exchange for absolute knowledge)
2) His soul can be compared to Dorian’s picture, which records the signs of time and corruption hidden behind Dorian’s eternal beauty.
3) She promised to drive me home; she denied breaking the vase; she admitted eating the cake/she confessed to eating the cake/ she congratulated me for (on?) passing my exam/ she proposed we should have a party.