must showcase
Regular verb: showcase - showcased- showcased

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must showcase
you must showcase
he must showcase
we must showcase
you must showcase
they must showcase 	I must be showcasing
you must be showcasing
he must be showcasing
we must be showcasing
you must be showcasing
they must be showcasing	I must have showcased
you must have showcased
he must have showcased
we must have showcased
you must have showcased
they must have showcased	I must have been showcasing
you must have been showcasing
he must have been showcasing
we must have been showcasing
you must have been showcasing
they must have been showcasing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't showcase
you mustn't showcase
he mustn't showcase
we mustn't showcase
you mustn't showcase
they mustn't showcase 	I mustn't be showcasing
you mustn't be showcasing
he mustn't be showcasing
we mustn't be showcasing
you mustn't be showcasing
they mustn't be showcasing	I mustn't have showcased
you mustn't have showcased
he mustn't have showcased
we mustn't have showcased
you mustn't have showcased
they mustn't have showcased	I mustn't have been showcasing
you mustn't have been showcasing
he mustn't have been showcasing
we mustn't have been showcasing
you mustn't have been showcasing
they mustn't have been showcasing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I showcase?
must you showcase?
must he showcase?
must we showcase?
must you showcase?
must they showcase? 	must I be showcasing?
must you be showcasing?
must he be showcasing?
must we be showcasing?
must you be showcasing?
must they be showcasing? 	must I have showcased?
must you have showcased?
must he have showcased?
must we have showcased?
must you have showcased?
must they have showcased? 	must I have been showcasing?
must you have been showcasing?
must he have been showcasing?
must we have been showcasing?
must you have been showcasing?
must they have been showcasing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I showcase?
mustn't you showcase?
mustn't he showcase?
mustn't we showcase?
mustn't you showcase?
mustn't they showcase? 	mustn't I be showcasing?
mustn't you be showcasing?
mustn't he be showcasing?
mustn't we be showcasing?
mustn't you be showcasing?
mustn't they be showcasing? 	mustn't I have showcased?
mustn't you have showcased?
mustn't he have showcased?
mustn't we have showcased?
mustn't you have showcased?
mustn't they have showcased? 	mustn't I have been showcasing?
mustn't you have been showcasing?
mustn't he have been showcasing?
mustn't we have been showcasing?
mustn't you have been showcasing?
mustn't they have been showcasing?