For a three-act plot analysis, put on your screenwriter’s hat. Moviemakers know the formula well: at the end of Act One, the main character is drawn in completely to a conflict. During Act Two, she is farthest away from her goals. At the end of Act Three, the story is resolved.
Act I
Rosalind and Orlando fall in love, and immediately each must flee into the woods to hide from separate threats on their lives. Neither knows the other is also in the woods.
Act II
After finding Orlando's love poems tacked to trees, a cross-dressed Rosalind plays a trick on her man. Act II ends with Orlando unexpectedly saving his brother's life.
Act III
Orlando misses Rosalind more than ever. She concocts a scheme to reunite with Orlando—as her female self—and simultaneously make everyone else happy as well.