По языку - reported speech (см. вложение)с каждого первых 5 предложений

1) (doing) his homework, he was thinking hard. 2) (having done) his homework, he went for a walk. 3) (selling) fruit, he looked back from time to time, hoping to see his friends. 4) (having sold) all the fruit, he went to see his friends. 5) (having eaten) all the potatoes, she drank a cup of tea. 6) (drinking) tea, she scalded her lips. 7) (running) in the yard, i fell and hurt my knee. 8) (looking) through some magazines, i came across an interesting article about ufos. 9) (having written) out and (learnt) all the new words, he was able to translate the text easily. 10) (having read) the story she closed the book and put it on the table

1. all documents have already been sent.2. if you meet him, do not say anything to him.3. upon entering the university, we took off our coats and went to the dining room.4. when the teacher entered the classroom, he remembered that he had forgotten his cap in the cafe.5. leave him alone, he is thinking.6. can not you hear me? 7. he is said to have worked here 10 years ago.8. if you had learnt all the rules necessary to write the test, you would not have any problems with english now.9. he had finished work by eight o'clock in the evening10. students wrote tests, and teachers checked them.11. i will not be surprised if she does not understand you.12. the teacher has not yet arrived, and students are waiting for him in the corridor.13. everyone realized that he had not prepared the report.14. no one saw him talking with the dean.15. when he opened the briefcase, he realized that he had forgotten the documents at home.16. by three o'clock we had already come home.17. our friends have not returned from london.18. he is considered an intelligent person.19. i think of go ing somewhere in a couple of weeks.20. when she leaving the room, she forgot to turn off the light.