could propound
Regular verb: propound - propounded- propounded

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