English verb conjugation
COULD SOUND

Regular verb: sound - sounded - sounded

Affirmation

Simple form	V-ing form
I could sound you could sound he could sound we could sound you could sound they could sound	I could be sounding you could be sounding he could be sounding we could be sounding you could be sounding they could be sounding
Perfect	V-ing perfect
I could have sounded you could have sounded he could have sounded we could have sounded you could have sounded they could have sounded	I could have been sounding you could have been sounding he could have been sounding we could have been sounding you could have been sounding they could have been sounding

Negation

Simple form	V-ing form
I could not sound you could not sound he could not sound we could not sound you could not sound they could not sound	I could not be sounding you could not be sounding he could not be sounding we could not be sounding you could not be sounding they could not be sounding
Perfect	V-ing perfect
I could not have sounded you could not have sounded he could not have sounded we could not have sounded you could not have sounded they could not have sounded	I could not have been sounding you could not have been sounding he could not have been sounding we could not have been sounding you could not have been sounding they could not have been sounding

Interrogative form

Simple form	V-ing form
could I sound? could you sound? could he sound? could we sound? could you sound? could they sound?	could I be sounding? could you be sounding? could he be sounding? could we be sounding? could you be sounding? could they be sounding?
Perfect	V-ing perfect
could I have sounded? could you have sounded? could he have sounded? could we have sounded? could you have sounded? could they have sounded?	could I have been sounding? could you have been sounding? could he have been sounding? could we have been sounding? could you have been sounding? could they have been sounding?

Interro-negative form

Simple form	V-ing form
could I not sound? could you not sound? could he not sound? could we not sound? could you not sound? could they not sound?	could I not be sounding? could you not be sounding? could he not be sounding? could we not be sounding? could you not be sounding? could they not be sounding?
Perfect	V-ing perfect
could I not have sounded? could you not have sounded? could he not have sounded? could we not have sounded? could you not have sounded? could they not have sounded?	could I not have been sounding? could you not have been sounding? could he not have been sounding? could we not have been sounding? could you not have been sounding? could they not have been sounding?