must scud
Regular verb: scud - scudded- scudded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must scud
you must scud
he must scud
we must scud
you must scud
they must scud 	I must be scudding
you must be scudding
he must be scudding
we must be scudding
you must be scudding
they must be scudding	I must have scudded
you must have scudded
he must have scudded
we must have scudded
you must have scudded
they must have scudded	I must have been scudding
you must have been scudding
he must have been scudding
we must have been scudding
you must have been scudding
they must have been scudding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't scud
you mustn't scud
he mustn't scud
we mustn't scud
you mustn't scud
they mustn't scud 	I mustn't be scudding
you mustn't be scudding
he mustn't be scudding
we mustn't be scudding
you mustn't be scudding
they mustn't be scudding	I mustn't have scudded
you mustn't have scudded
he mustn't have scudded
we mustn't have scudded
you mustn't have scudded
they mustn't have scudded	I mustn't have been scudding
you mustn't have been scudding
he mustn't have been scudding
we mustn't have been scudding
you mustn't have been scudding
they mustn't have been scudding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I scud?
must you scud?
must he scud?
must we scud?
must you scud?
must they scud? 	must I be scudding?
must you be scudding?
must he be scudding?
must we be scudding?
must you be scudding?
must they be scudding? 	must I have scudded?
must you have scudded?
must he have scudded?
must we have scudded?
must you have scudded?
must they have scudded? 	must I have been scudding?
must you have been scudding?
must he have been scudding?
must we have been scudding?
must you have been scudding?
must they have been scudding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I scud?
mustn't you scud?
mustn't he scud?
mustn't we scud?
mustn't you scud?
mustn't they scud? 	mustn't I be scudding?
mustn't you be scudding?
mustn't he be scudding?
mustn't we be scudding?
mustn't you be scudding?
mustn't they be scudding? 	mustn't I have scudded?
mustn't you have scudded?
mustn't he have scudded?
mustn't we have scudded?
mustn't you have scudded?
mustn't they have scudded? 	mustn't I have been scudding?
mustn't you have been scudding?
mustn't he have been scudding?
mustn't we have been scudding?
mustn't you have been scudding?
mustn't they have been scudding?