could scum
Verbe régulier : scum - scummed- scummed

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

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't scum
you couldn't scum
she couldn't scum
we couldn't scum
you couldn't scum
they couldn't scum 	I couldn't be scumming
you couldn't be scumming
she couldn't be scumming
we couldn't be scumming
you couldn't be scumming
they couldn't be scumming	I couldn't have scummed
you couldn't have scummed
she couldn't have scummed
we couldn't have scummed
you couldn't have scummed
they couldn't have scummed	I couldn't have been scumming
you couldn't have been scumming
she couldn't have been scumming
we couldn't have been scumming
you couldn't have been scumming
they couldn't have been scumming	

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

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