опять нужна помощь

            Раскройте скобки, употребив глагол в Future Perfect Continuous.

1.She (to study) in London for two years when I come here. 2. He (to teach) German for two years when I begin to teach English. 3. By next July she (to live) here for five years. 4. At six o’clock I (to work) for five hours. 5. I (to work) at the library for 8 hours when you come there.