must outswim
Irregular verb: outswim - outswam- outswum

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must outswim
you must outswim
he must outswim
we must outswim
you must outswim
they must outswim 	I must be outswiming
you must be outswiming
he must be outswiming
we must be outswiming
you must be outswiming
they must be outswiming	I must have outswum
you must have outswum
he must have outswum
we must have outswum
you must have outswum
they must have outswum	I must have been outswiming
you must have been outswiming
he must have been outswiming
we must have been outswiming
you must have been outswiming
they must have been outswiming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't outswim
you mustn't outswim
he mustn't outswim
we mustn't outswim
you mustn't outswim
they mustn't outswim 	I mustn't be outswiming
you mustn't be outswiming
he mustn't be outswiming
we mustn't be outswiming
you mustn't be outswiming
they mustn't be outswiming	I mustn't have outswum
you mustn't have outswum
he mustn't have outswum
we mustn't have outswum
you mustn't have outswum
they mustn't have outswum	I mustn't have been outswiming
you mustn't have been outswiming
he mustn't have been outswiming
we mustn't have been outswiming
you mustn't have been outswiming
they mustn't have been outswiming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I outswim?
must you outswim?
must he outswim?
must we outswim?
must you outswim?
must they outswim? 	must I be outswiming?
must you be outswiming?
must he be outswiming?
must we be outswiming?
must you be outswiming?
must they be outswiming? 	must I have outswum?
must you have outswum?
must he have outswum?
must we have outswum?
must you have outswum?
must they have outswum? 	must I have been outswiming?
must you have been outswiming?
must he have been outswiming?
must we have been outswiming?
must you have been outswiming?
must they have been outswiming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I outswim?
mustn't you outswim?
mustn't he outswim?
mustn't we outswim?
mustn't you outswim?
mustn't they outswim? 	mustn't I be outswiming?
mustn't you be outswiming?
mustn't he be outswiming?
mustn't we be outswiming?
mustn't you be outswiming?
mustn't they be outswiming? 	mustn't I have outswum?
mustn't you have outswum?
mustn't he have outswum?
mustn't we have outswum?
mustn't you have outswum?
mustn't they have outswum? 	mustn't I have been outswiming?
mustn't you have been outswiming?
mustn't he have been outswiming?
mustn't we have been outswiming?
mustn't you have been outswiming?
mustn't they have been outswiming?