can descale
Verbo regular: descale - descaled- descaled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can descale
you can descale
she can descale
we can descale
you can descale
they can descale 	I can be descaling
you can be descaling
she can be descaling
we can be descaling
you can be descaling
they can be descaling	I can have descaled
you can have descaled
she can have descaled
we can have descaled
you can have descaled
they can have descaled	I can have been descaling
you can have been descaling
she can have been descaling
we can have been descaling
you can have been descaling
they can have been descaling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can't descale
you can't descale
she can't descale
we can't descale
you can't descale
they can't descale 	I can't be descaling
you can't be descaling
she can't be descaling
we can't be descaling
you can't be descaling
they can't be descaling	I can't have descaled
you can't have descaled
she can't have descaled
we can't have descaled
you can't have descaled
they can't have descaled	I can't have been descaling
you can't have been descaling
she can't have been descaling
we can't have been descaling
you can't have been descaling
they can't have been descaling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I descale?
can you descale?
can she descale?
can we descale?
can you descale?
can they descale? 	can I be descaling?
can you be descaling?
can she be descaling?
can we be descaling?
can you be descaling?
can they be descaling? 	can I have descaled?
can you have descaled?
can she have descaled?
can we have descaled?
can you have descaled?
can they have descaled? 	can I have been descaling?
can you have been descaling?
can she have been descaling?
can we have been descaling?
can you have been descaling?
can they have been descaling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can't I descale?
can't you descale?
can't she descale?
can't we descale?
can't you descale?
can't they descale? 	can't I be descaling?
can't you be descaling?
can't she be descaling?
can't we be descaling?
can't you be descaling?
can't they be descaling? 	can't I have descaled?
can't you have descaled?
can't she have descaled?
can't we have descaled?
can't you have descaled?
can't they have descaled? 	can't I have been descaling?
can't you have been descaling?
can't she have been descaling?
can't we have been descaling?
can't you have been descaling?
can't they have been descaling?