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
he can descale
we can descale
you can descale
they can descale 	I can be descaling
you can be descaling
he can be descaling
we can be descaling
you can be descaling
they can be descaling	I can have descaled
you can have descaled
he 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
he 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 cannot descale
you cannot descale
he cannot descale
we cannot descale
you cannot descale
they cannot descale 	I cannot be descaling
you cannot be descaling
he cannot be descaling
we cannot be descaling
you cannot be descaling
they cannot be descaling	I cannot have descaled
you cannot have descaled
he cannot have descaled
we cannot have descaled
you cannot have descaled
they cannot have descaled	I cannot have been descaling
you cannot have been descaling
he cannot have been descaling
we cannot have been descaling
you cannot have been descaling
they cannot have been descaling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I descale?
can you descale?
can he descale?
can we descale?
can you descale?
can they descale? 	can I be descaling?
can you be descaling?
can he be descaling?
can we be descaling?
can you be descaling?
can they be descaling? 	can I have descaled?
can you have descaled?
can he 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 he 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 I not descale?
can you not descale?
can he not descale?
can we not descale?
can you not descale?
can they not descale? 	can I not be descaling?
can you not be descaling?
can he not be descaling?
can we not be descaling?
can you not be descaling?
can they not be descaling? 	can I not have descaled?
can you not have descaled?
can he not have descaled?
can we not have descaled?
can you not have descaled?
can they not have descaled? 	can I not have been descaling?
can you not have been descaling?
can he not have been descaling?
can we not have been descaling?
can you not have been descaling?
can they not have been descaling?