must propound
Regular verb: propound - propounded- propounded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must propound
you must propound
she must propound
we must propound
you must propound
they must propound 	I must be propounding
you must be propounding
she must be propounding
we must be propounding
you must be propounding
they must be propounding	I must have propounded
you must have propounded
she must have propounded
we must have propounded
you must have propounded
they must have propounded	I must have been propounding
you must have been propounding
she must have been propounding
we must have been propounding
you must have been propounding
they must have been propounding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not propound
you must not propound
she must not propound
we must not propound
you must not propound
they must not propound 	I must not be propounding
you must not be propounding
she must not be propounding
we must not be propounding
you must not be propounding
they must not be propounding	I must not have propounded
you must not have propounded
she must not have propounded
we must not have propounded
you must not have propounded
they must not have propounded	I must not have been propounding
you must not have been propounding
she must not have been propounding
we must not have been propounding
you must not have been propounding
they must not have been propounding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I propound?
must you propound?
must she propound?
must we propound?
must you propound?
must they propound? 	must I be propounding?
must you be propounding?
must she be propounding?
must we be propounding?
must you be propounding?
must they be propounding? 	must I have propounded?
must you have propounded?
must she have propounded?
must we have propounded?
must you have propounded?
must they have propounded? 	must I have been propounding?
must you have been propounding?
must she have been propounding?
must we have been propounding?
must you have been propounding?
must they have been propounding? 	

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