could spall
Verbo regular: spall - spalled- spalled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could spall
you could spall
he could spall
we could spall
you could spall
they could spall 	I could be spalling
you could be spalling
he could be spalling
we could be spalling
you could be spalling
they could be spalling	I could have spalled
you could have spalled
he could have spalled
we could have spalled
you could have spalled
they could have spalled	I could have been spalling
you could have been spalling
he could have been spalling
we could have been spalling
you could have been spalling
they could have been spalling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not spall
you could not spall
he could not spall
we could not spall
you could not spall
they could not spall 	I could not be spalling
you could not be spalling
he could not be spalling
we could not be spalling
you could not be spalling
they could not be spalling	I could not have spalled
you could not have spalled
he could not have spalled
we could not have spalled
you could not have spalled
they could not have spalled	I could not have been spalling
you could not have been spalling
he could not have been spalling
we could not have been spalling
you could not have been spalling
they could not have been spalling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I spall?
could you spall?
could he spall?
could we spall?
could you spall?
could they spall? 	could I be spalling?
could you be spalling?
could he be spalling?
could we be spalling?
could you be spalling?
could they be spalling? 	could I have spalled?
could you have spalled?
could he have spalled?
could we have spalled?
could you have spalled?
could they have spalled? 	could I have been spalling?
could you have been spalling?
could he have been spalling?
could we have been spalling?
could you have been spalling?
could they have been spalling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not spall?
could you not spall?
could he not spall?
could we not spall?
could you not spall?
could they not spall? 	could I not be spalling?
could you not be spalling?
could he not be spalling?
could we not be spalling?
could you not be spalling?
could they not be spalling? 	could I not have spalled?
could you not have spalled?
could he not have spalled?
could we not have spalled?
could you not have spalled?
could they not have spalled? 	could I not have been spalling?
could you not have been spalling?
could he not have been spalling?
could we not have been spalling?
could you not have been spalling?
could they not have been spalling?