Поставьте следующие предложения в вопросительную и отрицательную формы.
He was in Kiev last week. This is a pen. My sister works at the library. Our students read a lot of English books. I have a cat.

1)Was he in Kiev last week?He wasn't in Kiev last week.2)Is this a pen?This isn't a pen.3) Have I a cat?I haven't a cat.