Форма общие или специальные вопросы с вопросительным словом дано: We have been friends since childhood, (since when) 2. The rain hasn't stopped yet. (general) 3. The film has been on for a week, (for how long) 4. He had recovered by the time I returned from my leave, (general) 5. He will have worked as a teacher for 20 years by next September, (for how long) 6. The students will have started the discussion by the time you come, (who)

1 Since when  have we been friends?2.Has the rain  stopped yet?3.How long has the film  been on?4. Had he recovered by the time I returned from my leave?5. How long will he have worked as a teacher  by next September?6 Who will have started the discussion by the time you come?