El presente progresivo se forma conjugando el verbo to be en presente y el verbo principal agregando -ing
Estructuras:
Afirmativa
Sujeto + am/is/are + verbo -ing + complemento
I am writing a letter
Negativa
Sujeto + am/is/are + not + verbo -ing + complemento
We are not reading a story book
Simple question
Am/Is/Are + sujeto + verbo -ing + complemento
Are you a nurse?
Yes, I am
Are you a policeman?
No, I'm not
Let's practice
Exercise 1
Exercise 2
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