could chirrup
Verbo regular: chirrup - chirruped- chirruped

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could chirrup
you could chirrup
he could chirrup
we could chirrup
you could chirrup
they could chirrup 	I could be chirruping
you could be chirruping
he could be chirruping
we could be chirruping
you could be chirruping
they could be chirruping	I could have chirruped
you could have chirruped
he could have chirruped
we could have chirruped
you could have chirruped
they could have chirruped	I could have been chirruping
you could have been chirruping
he could have been chirruping
we could have been chirruping
you could have been chirruping
they could have been chirruping	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not chirrup
you could not chirrup
he could not chirrup
we could not chirrup
you could not chirrup
they could not chirrup 	I could not be chirruping
you could not be chirruping
he could not be chirruping
we could not be chirruping
you could not be chirruping
they could not be chirruping	I could not have chirruped
you could not have chirruped
he could not have chirruped
we could not have chirruped
you could not have chirruped
they could not have chirruped	I could not have been chirruping
you could not have been chirruping
he could not have been chirruping
we could not have been chirruping
you could not have been chirruping
they could not have been chirruping	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I chirrup?
could you chirrup?
could he chirrup?
could we chirrup?
could you chirrup?
could they chirrup? 	could I be chirruping?
could you be chirruping?
could he be chirruping?
could we be chirruping?
could you be chirruping?
could they be chirruping? 	could I have chirruped?
could you have chirruped?
could he have chirruped?
could we have chirruped?
could you have chirruped?
could they have chirruped? 	could I have been chirruping?
could you have been chirruping?
could he have been chirruping?
could we have been chirruping?
could you have been chirruping?
could they have been chirruping? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not chirrup?
could you not chirrup?
could he not chirrup?
could we not chirrup?
could you not chirrup?
could they not chirrup? 	could I not be chirruping?
could you not be chirruping?
could he not be chirruping?
could we not be chirruping?
could you not be chirruping?
could they not be chirruping? 	could I not have chirruped?
could you not have chirruped?
could he not have chirruped?
could we not have chirruped?
could you not have chirruped?
could they not have chirruped? 	could I not have been chirruping?
could you not have been chirruping?
could he not have been chirruping?
could we not have been chirruping?
could you not have been chirruping?
could they not have been chirruping?