Поставьте следующие предложения в отрицательную и вопросительную форму. 1 they are students. 2 you are going out. 3 i often write to my sister. 4 kate goes to school in the morning. 5 his ties are red and black. 6 she is going to learn french next year. 7 he knows english very well. 8 we are reading the text now.