[Intended to be presented by junior high or high-school level students of English as a foreign language. Continuing from here. Sans annotations here.]
Romeo: But how can I leave?
Narrator: Romeo climbs over the fence and returns to the Capulets' garden.
〔climb => 登る〕
〔over => （上に）わたって、越えて〕
〔fence => 塀〕
〔return to ～ => ～へ戻る〕
Benvolio: Where are you, Romeo?
〔where => どこ〕
Mercutio: I think he's gone to bed.
〔he's => （この場合は）「he has」の省略〕
〔go, went, gone => 行ってしまった状態〕
Benvolio: I think he has gone into the woods to be unhappy all by himself.
〔woods => 森、林〕
〔to be ～ => ～になるように〕
〔all by himself => 独りっきり〕
Mercutio: That's a typical young boy trick.
〔typical => 典型的な〕
〔trick => （計略、手品→）行為〕
Benvolio: Anyway, he doesn't want to be found.
〔want to be ～ => ～になりたい〕
〔find, found, found => 発見された状態〕
Narrator: So Benvolio and Mercutio go home.
〔go home => 自分の家へ戻る〕