While in the hospital, Lady Crawford emailed Ms. White.
Lady Crawford emailed Ms. White, who was in the hospital.
When Tidus overseas on deployment, he reported to his supervisor.
While his supervisor was overseas on deployment, Tidus reported to him.
While Sarah was on vacation, she offered to clean Maria’s apartment.
While Maria was on vacation, Sarah offered to clean her apartment.
Since Melissa lost her watch, both she and Beth were late.
Since Beth had lost Melissa’s watch, they both were late.