Future progressive
Present progressive is estar conjugated in the present + present participle
Past progressive is estar in the imperfect tense + present participle
How about future? Would it be like this?
They will be singing. Ellos estarán cantando. Ellos van a estar cantando.
Which form do you guys use more? The ir a + infinitive or estar (future) + present participle
2 Answers
Creo que ir a + infinitive es más común:
Parece que va a llover. (El cielo se está nublando.)
Parece que hoy estará lloviendo todo el día.
Looks like it's going to rain (The sky is clouding up).
Vamos a llegar a medianoche.
Estaremos llegando a medianoche.
We will arrive at midnight.
Though it's fairly uncommon in standard use, you've got it exactly right.
Estará trabajando cuando llegues.
He/she/it will be working when you arrive.
Hope this helps =)