Match the gerund or gerund phrase use to the correct part of speech in the sentences below. Indirect object
Object of a preposition
Subject
Direct Subject

DRIVING THE CAB was his second job.
The athletes began STRETCHING.
Charles tried JUGGLING to impress you.
He sang before ACTING.

The main themes of the play are: fate and free will with the inevitability of oracular predictions is a theme that often occurs in greek tragedies the conflict between the individual and the state similar to that in sophocles’ “antigone” and   people’s willingness to ignore painful truths both oedipus and jocasta clutch at unlikely details in order to avoiding facing up to the inceasingly apparent truth and sight and blindness the irony that the blind seer tiresius can actually “see” more clearly than the supposedly clear-eyed oedipus, who is in reality blind to the truth about his origins and his inadvertent crimes.

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Can u explain more plz