Напишите пожалуйста 10 образцов с глаголом be в прошедшем и будущем

1.I am a pupil.
2.It was the most difficult exercise.
3.She is the best dancer in our class.
4.He was the only pupil who came at the time.
5.This exercise is very easy.
6.My sister is a student.
7.My friends are very kind.
8.It was very sunny yesterday.
9.She is very beautiful.
10.My father is a doctor.