Oh, yes, I heard the voices, but I did not hear what they said. A faint spot of colour came into her cheek. 
I heard the voices but couldn't understand them.
I didn't hear the voices.
The baby who is crawling is wearing a blue outfit.
You could tell the women were rich because of the elegant clothing they wore.
A little girl running a marathon.
Nobody is playing
Two people wait in line for the escalator.
You know that we know that you do not know.