Переведите предложения на английский язык, обращая внимание на форму времени глагола-сказуемого. 1 я не видел моего друга

1. I have not seen my friend since we graduated from the institute.2. I have not been to the theater since the fall.3. We have not met with Petrov for ages.4. How many English books have you read since you started learning English?5. Do you know how many schools and hospitals have been built in your hometown since you left there?6. This actor did not take part in the performances since the spring of last year. All this time he was very ill.7. My son learned to read last year and since then he has read many children\'s books.8. I have not received letters from my parents for a long time.9. Many new houses have been built in Moscow since he came here for the last time.10. It is a pity that since that time this writer has not written anything new.11. Why have not you written to us since 1974?12. What other museums have you visited since then?