Respuesta:
He: He is dreaming./ He isn't dreaming./ Is he dreaming?
She: She is sleeping./ She isn't sleeping./ Is she sleeping?
It: It is snowing./ It isn't snowing./ Is It snowing?
We: We are singing./ We aren't singing./ Are we singing?
They: They are fighting./ The aren't fighting./ Are they fighting?
Explicación:
La formacion de presente continuo es usando el verbo to be y -ing en el verbo siguiente, el verbo to be varía dependiendo el sujeto:
I am
You are
He-She-It is
We-You-They are
•La formación del presente continuo en positivo sería:
Suj + verb to be + verb +ing + compl.
•En negativo sería añadiendo not:
Suj + verb to be + not + verb + ing + compl.
•En interrogativa se tendría que poner el verbo to be delante del sujeto:
Verb to be + suj + verb + ing + compl.?