Хелп!30 баллов!Поставьте предложение в отрицательную и вопросительную форму
1. i've bought many products today.
2. we have discussed conditions at the conference.
3. we have met our students in the college.
4. Pete has bought a new leather jacket this summer.
5. his sister has just come back from Sochi.
6. my friends have been to the Black Sea summer.