could spall
Regular verb: spall - spalled- spalled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't spall
you couldn't spall
he couldn't spall
we couldn't spall
you couldn't spall
they couldn't spall 	I couldn't be spalling
you couldn't be spalling
he couldn't be spalling
we couldn't be spalling
you couldn't be spalling
they couldn't be spalling	I couldn't have spalled
you couldn't have spalled
he couldn't have spalled
we couldn't have spalled
you couldn't have spalled
they couldn't have spalled	I couldn't have been spalling
you couldn't have been spalling
he couldn't have been spalling
we couldn't have been spalling
you couldn't have been spalling
they couldn't have been spalling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I spall?
couldn't you spall?
couldn't he spall?
couldn't we spall?
couldn't you spall?
couldn't they spall? 	couldn't I be spalling?
couldn't you be spalling?
couldn't he be spalling?
couldn't we be spalling?
couldn't you be spalling?
couldn't they be spalling? 	couldn't I have spalled?
couldn't you have spalled?
couldn't he have spalled?
couldn't we have spalled?
couldn't you have spalled?
couldn't they have spalled? 	couldn't I have been spalling?
couldn't you have been spalling?
couldn't he have been spalling?
couldn't we have been spalling?
couldn't you have been spalling?
couldn't they have been spalling?