20 баллов! Поставьте предложения в отрицательную и вопросительную форму и переведите:
i've bought many products today
we have discussed conditions at the conference
we have met our students in the college
pete has bought a new leather jacket this summer
his sister has just come back from sochi
my friend have been to the black sea this summer

1 i have not bought many products today2 we have not .....3 we have not....4 his sister has not...5 my friend have not....