must scumble
Verbe régulier : scumble - scumbled- scumbled

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must scumble
you must scumble
he must scumble
we must scumble
you must scumble
they must scumble 	I must be scumbling
you must be scumbling
he must be scumbling
we must be scumbling
you must be scumbling
they must be scumbling	I must have scumbled
you must have scumbled
he must have scumbled
we must have scumbled
you must have scumbled
they must have scumbled	I must have been scumbling
you must have been scumbling
he must have been scumbling
we must have been scumbling
you must have been scumbling
they must have been scumbling	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't scumble
you mustn't scumble
he mustn't scumble
we mustn't scumble
you mustn't scumble
they mustn't scumble 	I mustn't be scumbling
you mustn't be scumbling
he mustn't be scumbling
we mustn't be scumbling
you mustn't be scumbling
they mustn't be scumbling	I mustn't have scumbled
you mustn't have scumbled
he mustn't have scumbled
we mustn't have scumbled
you mustn't have scumbled
they mustn't have scumbled	I mustn't have been scumbling
you mustn't have been scumbling
he mustn't have been scumbling
we mustn't have been scumbling
you mustn't have been scumbling
they mustn't have been scumbling	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I scumble?
must you scumble?
must he scumble?
must we scumble?
must you scumble?
must they scumble? 	must I be scumbling?
must you be scumbling?
must he be scumbling?
must we be scumbling?
must you be scumbling?
must they be scumbling? 	must I have scumbled?
must you have scumbled?
must he have scumbled?
must we have scumbled?
must you have scumbled?
must they have scumbled? 	must I have been scumbling?
must you have been scumbling?
must he have been scumbling?
must we have been scumbling?
must you have been scumbling?
must they have been scumbling? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I scumble?
mustn't you scumble?
mustn't he scumble?
mustn't we scumble?
mustn't you scumble?
mustn't they scumble? 	mustn't I be scumbling?
mustn't you be scumbling?
mustn't he be scumbling?
mustn't we be scumbling?
mustn't you be scumbling?
mustn't they be scumbling? 	mustn't I have scumbled?
mustn't you have scumbled?
mustn't he have scumbled?
mustn't we have scumbled?
mustn't you have scumbled?
mustn't they have scumbled? 	mustn't I have been scumbling?
mustn't you have been scumbling?
mustn't he have been scumbling?
mustn't we have been scumbling?
mustn't you have been scumbling?
mustn't they have been scumbling?