Respuestas
Respuesta:
1. Do you usually eat vegetables?
2. Sorry, I can't talk now. I'm brushing my teeth.
3. Sandy doesn't drink alcohol very often.
4. They work at the factory from Monday to Friday.
5. Listen! Somebody is shouting!
6. He doesn't have time now. He is doing his homework.
7. How often does she go to the dentist?
8. We go out for dinner every Saturday night.
9. Be quiet! I'm studying for tomorrow's exam.
10. She's not at home at the moment. I think she's doing the shopping.
Explicación:
Hola! Te voy a dar mi truco aunque supongo que ya te lo han explicado, fíjate si la acción sucede justo cuándo se está diciendo la frase o no. Por ejemplo en la 6, sabes que la persona está estudiando justo en el momento en el que se está diciendo la frase y por eso debes usar el Present Continuous. Espero haberte ayudado!!