must scuffle
Regular verb: scuffle - scuffled- scuffled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must scuffle
you must scuffle
she must scuffle
we must scuffle
you must scuffle
they must scuffle 	I must be scuffling
you must be scuffling
she must be scuffling
we must be scuffling
you must be scuffling
they must be scuffling	I must have scuffled
you must have scuffled
she must have scuffled
we must have scuffled
you must have scuffled
they must have scuffled	I must have been scuffling
you must have been scuffling
she must have been scuffling
we must have been scuffling
you must have been scuffling
they must have been scuffling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't scuffle
you mustn't scuffle
she mustn't scuffle
we mustn't scuffle
you mustn't scuffle
they mustn't scuffle 	I mustn't be scuffling
you mustn't be scuffling
she mustn't be scuffling
we mustn't be scuffling
you mustn't be scuffling
they mustn't be scuffling	I mustn't have scuffled
you mustn't have scuffled
she mustn't have scuffled
we mustn't have scuffled
you mustn't have scuffled
they mustn't have scuffled	I mustn't have been scuffling
you mustn't have been scuffling
she mustn't have been scuffling
we mustn't have been scuffling
you mustn't have been scuffling
they mustn't have been scuffling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I scuffle?
must you scuffle?
must she scuffle?
must we scuffle?
must you scuffle?
must they scuffle? 	must I be scuffling?
must you be scuffling?
must she be scuffling?
must we be scuffling?
must you be scuffling?
must they be scuffling? 	must I have scuffled?
must you have scuffled?
must she have scuffled?
must we have scuffled?
must you have scuffled?
must they have scuffled? 	must I have been scuffling?
must you have been scuffling?
must she have been scuffling?
must we have been scuffling?
must you have been scuffling?
must they have been scuffling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I scuffle?
mustn't you scuffle?
mustn't she scuffle?
mustn't we scuffle?
mustn't you scuffle?
mustn't they scuffle? 	mustn't I be scuffling?
mustn't you be scuffling?
mustn't she be scuffling?
mustn't we be scuffling?
mustn't you be scuffling?
mustn't they be scuffling? 	mustn't I have scuffled?
mustn't you have scuffled?
mustn't she have scuffled?
mustn't we have scuffled?
mustn't you have scuffled?
mustn't they have scuffled? 	mustn't I have been scuffling?
mustn't you have been scuffling?
mustn't she have been scuffling?
mustn't we have been scuffling?
mustn't you have been scuffling?
mustn't they have been scuffling?