с английским
past,present perfect

1. by 8 o'clock they will have had dinner. 2. by the end of the week he will have finished the translation. 3, before you come i will have done all the work. 4. she will have looked through the article by 12 o'clock. 5. they will have received our letter by monday. 6. by the time we get to the forest the rain will have stopped. 7. i think he will have answered the letter by this time. 8. we will begin to work after we read all the instructions. 9. we will not do anything until he takes necessary steps. 10. the committee will have prepared the plan by tomorrow. 11.i suppose when my letter reaches you will have already  returned from your voyage. 12. he will pass an exam after he learns all the material. 13. i am afraid they will not have discussed all the questions by the time they come. 14. we will not be able to start the experiment before we obtain the necessary data. 15. the secretary will have already looked through all the papers before the boss comes. 16. my train will have left by the time you come to the station.