could descale
Verbe régulier : descale - descaled- descaled
Traduction française : détartrer 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could descale
you could descale
she could descale
we could descale
you could descale
they could descale 	I could be descaling
you could be descaling
she could be descaling
we could be descaling
you could be descaling
they could be descaling	I could have descaled
you could have descaled
she could have descaled
we could have descaled
you could have descaled
they could have descaled	I could have been descaling
you could have been descaling
she could have been descaling
we could have been descaling
you could have been descaling
they could have been descaling	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't descale
you couldn't descale
she couldn't descale
we couldn't descale
you couldn't descale
they couldn't descale 	I couldn't be descaling
you couldn't be descaling
she couldn't be descaling
we couldn't be descaling
you couldn't be descaling
they couldn't be descaling	I couldn't have descaled
you couldn't have descaled
she couldn't have descaled
we couldn't have descaled
you couldn't have descaled
they couldn't have descaled	I couldn't have been descaling
you couldn't have been descaling
she couldn't have been descaling
we couldn't have been descaling
you couldn't have been descaling
they couldn't have been descaling	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I descale?
could you descale?
could she descale?
could we descale?
could you descale?
could they descale? 	could I be descaling?
could you be descaling?
could she be descaling?
could we be descaling?
could you be descaling?
could they be descaling? 	could I have descaled?
could you have descaled?
could she have descaled?
could we have descaled?
could you have descaled?
could they have descaled? 	could I have been descaling?
could you have been descaling?
could she have been descaling?
could we have been descaling?
could you have been descaling?
could they have been descaling? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I descale?
couldn't you descale?
couldn't she descale?
couldn't we descale?
couldn't you descale?
couldn't they descale? 	couldn't I be descaling?
couldn't you be descaling?
couldn't she be descaling?
couldn't we be descaling?
couldn't you be descaling?
couldn't they be descaling? 	couldn't I have descaled?
couldn't you have descaled?
couldn't she have descaled?
couldn't we have descaled?
couldn't you have descaled?
couldn't they have descaled? 	couldn't I have been descaling?
couldn't you have been descaling?
couldn't she have been descaling?
couldn't we have been descaling?
couldn't you have been descaling?
couldn't they have been descaling?