Упражнение 3.2. Вставьте нужную форму вспомогательного глагола BE (am, is, are) в предложения: My friend ___ reading a book. I ___ drinking tea. They ___ making noise. He ___ looking through the window. She ___ helping about the house. We ___ watching TV. Granny ___ cooking dinner. The birds ___ swimming on the lake. The dog ___ sitting at the door. It ___ looking at me.

1. My friend is reading a book.
2. I am drinking tea.
3. They are making noise.
4. He is looking through the window.
5. She is helping about the house.
6. We are watching TV.
7. Granny is cooking dinner.
8. The birds are swimming on the lake.
9. The dog is sitting at the door.
10. It is looking at me.

Правило: с I употребляется am, с формами единственного числа — is, с формами множественного числа и you — are.