must sparkle
Regular verb: sparkle - sparkled- sparkled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must sparkle
you must sparkle
he must sparkle
we must sparkle
you must sparkle
they must sparkle 	I must be sparkling
you must be sparkling
he must be sparkling
we must be sparkling
you must be sparkling
they must be sparkling	I must have sparkled
you must have sparkled
he must have sparkled
we must have sparkled
you must have sparkled
they must have sparkled	I must have been sparkling
you must have been sparkling
he must have been sparkling
we must have been sparkling
you must have been sparkling
they must have been sparkling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't sparkle
you mustn't sparkle
he mustn't sparkle
we mustn't sparkle
you mustn't sparkle
they mustn't sparkle 	I mustn't be sparkling
you mustn't be sparkling
he mustn't be sparkling
we mustn't be sparkling
you mustn't be sparkling
they mustn't be sparkling	I mustn't have sparkled
you mustn't have sparkled
he mustn't have sparkled
we mustn't have sparkled
you mustn't have sparkled
they mustn't have sparkled	I mustn't have been sparkling
you mustn't have been sparkling
he mustn't have been sparkling
we mustn't have been sparkling
you mustn't have been sparkling
they mustn't have been sparkling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I sparkle?
must you sparkle?
must he sparkle?
must we sparkle?
must you sparkle?
must they sparkle? 	must I be sparkling?
must you be sparkling?
must he be sparkling?
must we be sparkling?
must you be sparkling?
must they be sparkling? 	must I have sparkled?
must you have sparkled?
must he have sparkled?
must we have sparkled?
must you have sparkled?
must they have sparkled? 	must I have been sparkling?
must you have been sparkling?
must he have been sparkling?
must we have been sparkling?
must you have been sparkling?
must they have been sparkling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I sparkle?
mustn't you sparkle?
mustn't he sparkle?
mustn't we sparkle?
mustn't you sparkle?
mustn't they sparkle? 	mustn't I be sparkling?
mustn't you be sparkling?
mustn't he be sparkling?
mustn't we be sparkling?
mustn't you be sparkling?
mustn't they be sparkling? 	mustn't I have sparkled?
mustn't you have sparkled?
mustn't he have sparkled?
mustn't we have sparkled?
mustn't you have sparkled?
mustn't they have sparkled? 	mustn't I have been sparkling?
mustn't you have been sparkling?
mustn't he have been sparkling?
mustn't we have been sparkling?
mustn't you have been sparkling?
mustn't they have been sparkling?