Поставить предложения в вопросительную и отрицательную форму. 1) these are pencils 2) it is a tree 3) his wife is fifty 4) ben is from canada 5) they are doctors

1) Are these pencils? These aren't pencils.
2) Is it a tree? It isn't a tree.
3) Is his wife fifty? His wife isn't fifty.
4) Is Ben from Canada? Ben isn't from Canada.
5) Are they doctors? They aren't doctors.

1)These aren't pencils. Are these pencils?
2)It isn't a tree. Is it a tree?
3)His wife isn't fifty. Is his wife fifty ?
4)Ben isn't from Canada. Is Ben from Canada ?
5)They aren't doctors. Are they doctors ?