English verb conjugation
COULD PROPOUND

Regular verb: propound - propounded - propounded

Affirmation

Simple form	V-ing form
I could propound you could propound he could propound we could propound you could propound they could propound	I could be propounding you could be propounding he could be propounding we could be propounding you could be propounding they could be propounding
Perfect	V-ing perfect
I could have propounded you could have propounded he could have propounded we could have propounded you could have propounded they could have propounded	I could have been propounding you could have been propounding he could have been propounding we could have been propounding you could have been propounding they could have been propounding

Negation

Simple form	V-ing form
I could not propound you could not propound he could not propound we could not propound you could not propound they could not propound	I could not be propounding you could not be propounding he could not be propounding we could not be propounding you could not be propounding they could not be propounding
Perfect	V-ing perfect
I could not have propounded you could not have propounded he could not have propounded we could not have propounded you could not have propounded they could not have propounded	I could not have been propounding you could not have been propounding he could not have been propounding we could not have been propounding you could not have been propounding they could not have been propounding

Interrogative form

Simple form	V-ing form
could I propound? could you propound? could he propound? could we propound? could you propound? could they propound?	could I be propounding? could you be propounding? could he be propounding? could we be propounding? could you be propounding? could they be propounding?
Perfect	V-ing perfect
could I have propounded? could you have propounded? could he have propounded? could we have propounded? could you have propounded? could they have propounded?	could I have been propounding? could you have been propounding? could he have been propounding? could we have been propounding? could you have been propounding? could they have been propounding?

Interro-negative form

Simple form	V-ing form
could I not propound? could you not propound? could he not propound? could we not propound? could you not propound? could they not propound?	could I not be propounding? could you not be propounding? could he not be propounding? could we not be propounding? could you not be propounding? could they not be propounding?
Perfect	V-ing perfect
could I not have propounded? could you not have propounded? could he not have propounded? could we not have propounded? could you not have propounded? could they not have propounded?	could I not have been propounding? could you not have been propounding? could he not have been propounding? could we not have been propounding? could you not have been propounding? could they not have been propounding?