must confound
Regular verb: confound - confounded- confounded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must confound
you must confound
he must confound
we must confound
you must confound
they must confound 	I must be confounding
you must be confounding
he must be confounding
we must be confounding
you must be confounding
they must be confounding	I must have confounded
you must have confounded
he must have confounded
we must have confounded
you must have confounded
they must have confounded	I must have been confounding
you must have been confounding
he must have been confounding
we must have been confounding
you must have been confounding
they must have been confounding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't confound
you mustn't confound
he mustn't confound
we mustn't confound
you mustn't confound
they mustn't confound 	I mustn't be confounding
you mustn't be confounding
he mustn't be confounding
we mustn't be confounding
you mustn't be confounding
they mustn't be confounding	I mustn't have confounded
you mustn't have confounded
he mustn't have confounded
we mustn't have confounded
you mustn't have confounded
they mustn't have confounded	I mustn't have been confounding
you mustn't have been confounding
he mustn't have been confounding
we mustn't have been confounding
you mustn't have been confounding
they mustn't have been confounding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I confound?
must you confound?
must he confound?
must we confound?
must you confound?
must they confound? 	must I be confounding?
must you be confounding?
must he be confounding?
must we be confounding?
must you be confounding?
must they be confounding? 	must I have confounded?
must you have confounded?
must he have confounded?
must we have confounded?
must you have confounded?
must they have confounded? 	must I have been confounding?
must you have been confounding?
must he have been confounding?
must we have been confounding?
must you have been confounding?
must they have been confounding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I confound?
mustn't you confound?
mustn't he confound?
mustn't we confound?
mustn't you confound?
mustn't they confound? 	mustn't I be confounding?
mustn't you be confounding?
mustn't he be confounding?
mustn't we be confounding?
mustn't you be confounding?
mustn't they be confounding? 	mustn't I have confounded?
mustn't you have confounded?
mustn't he have confounded?
mustn't we have confounded?
mustn't you have confounded?
mustn't they have confounded? 	mustn't I have been confounding?
mustn't you have been confounding?
mustn't he have been confounding?
mustn't we have been confounding?
mustn't you have been confounding?
mustn't they have been confounding?