Respuestas
PRESENT CONTINUOUS
Se utiliza para mencionar acciones que aún no han finalizado. Su estructura es: verbo to be (en presente) + verbo en gerundio (+ing).
Simplemente escribimos el verbo to be en la persona que corresponda y luego al verbo principal le añadimos la terminación -ing (en el caso de los verbos que terminan en e esta desaparece: have - having).
¿Cómo sabemos qué persona utilizar? Muy sencillo:
Si la persona es primera persona del singular (yo), la forma que tiene el verbo to be es am: I am.
Si la persona es tercera persona del singular (él/ella/eso), la forma que tiene el verbo to be es is: he/she/it is.
Si la persona es plural o segunda persona del singular (tú/nosotros/vosotros/ellos), la forma que tiene el verbo to be es are: you/we/they are.
RESPUESTA
1. Julia is doing her homework at home.
2. Ernesto is sailing in the lake with his father.
3. My grandmother is baking some cakes.
4. Lorenzo and Susan are playing table tenis.
5. I am writing a letter to my boyfriend.
6. Roberto is waiting for his teacher.
7. William and Anne are drinking some orange juice.
8. The teacher is correcting some tests.
9. That heavy man is carrying some big parcels.
10. Flora is flying to Los Angeles now.
11. David is reading the newspaper in the library.
12. Victoria is wearing a long blue skirt.
13. You are running in the park with the dog.
14. The kids are watching television now.
15. Patrick is having a bath.
16. Walter is singing an English song.
17. The girl is riding her bicycle.
18. We are picking some flowers in the country.
19. Tom is helping his father in the garage.
20. Alice is celebrating her birthday party.
21. You are doing some shopping now.
22. They are enjoying their summer holidays.