Respuesta:
1. the boy is reading a book
the boy was reading a book
the boy will reading a book
2.the cat is sleeping in the bed
the cat was sleeping in the bed
the cat will sleeping in the bed
3.she is watching a movie in the house
she was watching a movie in the house
she will watching a movie in the house
4.they are Walking in the park
they were Walking in the park
they will walking in the park
