could fall
Verbo irregular: fall - fell- fallen

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could fall
you could fall
he could fall
we could fall
you could fall
they could fall 	I could be falling
you could be falling
he could be falling
we could be falling
you could be falling
they could be falling	I could have fallen
you could have fallen
he could have fallen
we could have fallen
you could have fallen
they could have fallen	I could have been falling
you could have been falling
he could have been falling
we could have been falling
you could have been falling
they could have been falling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't fall
you couldn't fall
he couldn't fall
we couldn't fall
you couldn't fall
they couldn't fall 	I couldn't be falling
you couldn't be falling
he couldn't be falling
we couldn't be falling
you couldn't be falling
they couldn't be falling	I couldn't have fallen
you couldn't have fallen
he couldn't have fallen
we couldn't have fallen
you couldn't have fallen
they couldn't have fallen	I couldn't have been falling
you couldn't have been falling
he couldn't have been falling
we couldn't have been falling
you couldn't have been falling
they couldn't have been falling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I fall?
could you fall?
could he fall?
could we fall?
could you fall?
could they fall? 	could I be falling?
could you be falling?
could he be falling?
could we be falling?
could you be falling?
could they be falling? 	could I have fallen?
could you have fallen?
could he have fallen?
could we have fallen?
could you have fallen?
could they have fallen? 	could I have been falling?
could you have been falling?
could he have been falling?
could we have been falling?
could you have been falling?
could they have been falling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I fall?
couldn't you fall?
couldn't he fall?
couldn't we fall?
couldn't you fall?
couldn't they fall? 	couldn't I be falling?
couldn't you be falling?
couldn't he be falling?
couldn't we be falling?
couldn't you be falling?
couldn't they be falling? 	couldn't I have fallen?
couldn't you have fallen?
couldn't he have fallen?
couldn't we have fallen?
couldn't you have fallen?
couldn't they have fallen? 	couldn't I have been falling?
couldn't you have been falling?
couldn't he have been falling?
couldn't we have been falling?
couldn't you have been falling?
couldn't they have been falling?