could frill
Verbo regular: frill - frilled- frilled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could frill
you could frill
he could frill
we could frill
you could frill
they could frill 	I could be frilling
you could be frilling
he could be frilling
we could be frilling
you could be frilling
they could be frilling	I could have frilled
you could have frilled
he could have frilled
we could have frilled
you could have frilled
they could have frilled	I could have been frilling
you could have been frilling
he could have been frilling
we could have been frilling
you could have been frilling
they could have been frilling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not frill
you could not frill
he could not frill
we could not frill
you could not frill
they could not frill 	I could not be frilling
you could not be frilling
he could not be frilling
we could not be frilling
you could not be frilling
they could not be frilling	I could not have frilled
you could not have frilled
he could not have frilled
we could not have frilled
you could not have frilled
they could not have frilled	I could not have been frilling
you could not have been frilling
he could not have been frilling
we could not have been frilling
you could not have been frilling
they could not have been frilling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I frill?
could you frill?
could he frill?
could we frill?
could you frill?
could they frill? 	could I be frilling?
could you be frilling?
could he be frilling?
could we be frilling?
could you be frilling?
could they be frilling? 	could I have frilled?
could you have frilled?
could he have frilled?
could we have frilled?
could you have frilled?
could they have frilled? 	could I have been frilling?
could you have been frilling?
could he have been frilling?
could we have been frilling?
could you have been frilling?
could they have been frilling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not frill?
could you not frill?
could he not frill?
could we not frill?
could you not frill?
could they not frill? 	could I not be frilling?
could you not be frilling?
could he not be frilling?
could we not be frilling?
could you not be frilling?
could they not be frilling? 	could I not have frilled?
could you not have frilled?
could he not have frilled?
could we not have frilled?
could you not have frilled?
could they not have frilled? 	could I not have been frilling?
could you not have been frilling?
could he not have been frilling?
could we not have been frilling?
could you not have been frilling?
could they not have been frilling?