could fizz
Verbo regular: fizz - fizzed- fizzed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could fizz
you could fizz
he could fizz
we could fizz
you could fizz
they could fizz 	I could be fizzing
you could be fizzing
he could be fizzing
we could be fizzing
you could be fizzing
they could be fizzing	I could have fizzed
you could have fizzed
he could have fizzed
we could have fizzed
you could have fizzed
they could have fizzed	I could have been fizzing
you could have been fizzing
he could have been fizzing
we could have been fizzing
you could have been fizzing
they could have been fizzing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not fizz
you could not fizz
he could not fizz
we could not fizz
you could not fizz
they could not fizz 	I could not be fizzing
you could not be fizzing
he could not be fizzing
we could not be fizzing
you could not be fizzing
they could not be fizzing	I could not have fizzed
you could not have fizzed
he could not have fizzed
we could not have fizzed
you could not have fizzed
they could not have fizzed	I could not have been fizzing
you could not have been fizzing
he could not have been fizzing
we could not have been fizzing
you could not have been fizzing
they could not have been fizzing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I fizz?
could you fizz?
could he fizz?
could we fizz?
could you fizz?
could they fizz? 	could I be fizzing?
could you be fizzing?
could he be fizzing?
could we be fizzing?
could you be fizzing?
could they be fizzing? 	could I have fizzed?
could you have fizzed?
could he have fizzed?
could we have fizzed?
could you have fizzed?
could they have fizzed? 	could I have been fizzing?
could you have been fizzing?
could he have been fizzing?
could we have been fizzing?
could you have been fizzing?
could they have been fizzing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not fizz?
could you not fizz?
could he not fizz?
could we not fizz?
could you not fizz?
could they not fizz? 	could I not be fizzing?
could you not be fizzing?
could he not be fizzing?
could we not be fizzing?
could you not be fizzing?
could they not be fizzing? 	could I not have fizzed?
could you not have fizzed?
could he not have fizzed?
could we not have fizzed?
could you not have fizzed?
could they not have fizzed? 	could I not have been fizzing?
could you not have been fizzing?
could he not have been fizzing?
could we not have been fizzing?
could you not have been fizzing?
could they not have been fizzing?