must scum
Verbe régulier : scum - scummed- scummed

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must scum
you must scum
she must scum
we must scum
you must scum
they must scum 	I must be scumming
you must be scumming
she must be scumming
we must be scumming
you must be scumming
they must be scumming	I must have scummed
you must have scummed
she must have scummed
we must have scummed
you must have scummed
they must have scummed	I must have been scumming
you must have been scumming
she must have been scumming
we must have been scumming
you must have been scumming
they must have been scumming	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not scum
you must not scum
she must not scum
we must not scum
you must not scum
they must not scum 	I must not be scumming
you must not be scumming
she must not be scumming
we must not be scumming
you must not be scumming
they must not be scumming	I must not have scummed
you must not have scummed
she must not have scummed
we must not have scummed
you must not have scummed
they must not have scummed	I must not have been scumming
you must not have been scumming
she must not have been scumming
we must not have been scumming
you must not have been scumming
they must not have been scumming	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I scum?
must you scum?
must she scum?
must we scum?
must you scum?
must they scum? 	must I be scumming?
must you be scumming?
must she be scumming?
must we be scumming?
must you be scumming?
must they be scumming? 	must I have scummed?
must you have scummed?
must she have scummed?
must we have scummed?
must you have scummed?
must they have scummed? 	must I have been scumming?
must you have been scumming?
must she have been scumming?
must we have been scumming?
must you have been scumming?
must they have been scumming? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not scum?
must you not scum?
must she not scum?
must we not scum?
must you not scum?
must they not scum? 	must I not be scumming?
must you not be scumming?
must she not be scumming?
must we not be scumming?
must you not be scumming?
must they not be scumming? 	must I not have scummed?
must you not have scummed?
must she not have scummed?
must we not have scummed?
must you not have scummed?
must they not have scummed? 	must I not have been scumming?
must you not have been scumming?
must she not have been scumming?
must we not have been scumming?
must you not have been scumming?
must they not have been scumming?