Are there any metaphors in Shylock's monologue?

Yes..try reading it out loud, think about the time they were in (the Jews were kept separate and hated..they were also rich, so business men used to go to them for loans it cause resentment) if it helps watch the film with Al Pacino playing Shylock - it will make your homework much easier - I'm sure you can find this monologue on youtube,