James was talking to Peter.

Sue was reading a storybook.

Rudy was erasing the chalkboard.

David was doing the math exercise.

Peter was showing Joe his new watch.

Jane was drawing a horse in her notebook.

Ahmad was looking for his pencil.

Some children were making a lot of noise.

A formação do past progressive é feita com o passado do verbo "to be" (was/were) + o gerúndio do verbo principal (base do verbo + -ing).