could spiral
Regular verb: spiral - spiralled- spiralled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could spiral
you could spiral
he could spiral
we could spiral
you could spiral
they could spiral 	I could be spiralling
you could be spiralling
he could be spiralling
we could be spiralling
you could be spiralling
they could be spiralling	I could have spiralled
you could have spiralled
he could have spiralled
we could have spiralled
you could have spiralled
they could have spiralled	I could have been spiralling
you could have been spiralling
he could have been spiralling
we could have been spiralling
you could have been spiralling
they could have been spiralling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't spiral
you couldn't spiral
he couldn't spiral
we couldn't spiral
you couldn't spiral
they couldn't spiral 	I couldn't be spiralling
you couldn't be spiralling
he couldn't be spiralling
we couldn't be spiralling
you couldn't be spiralling
they couldn't be spiralling	I couldn't have spiralled
you couldn't have spiralled
he couldn't have spiralled
we couldn't have spiralled
you couldn't have spiralled
they couldn't have spiralled	I couldn't have been spiralling
you couldn't have been spiralling
he couldn't have been spiralling
we couldn't have been spiralling
you couldn't have been spiralling
they couldn't have been spiralling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I spiral?
could you spiral?
could he spiral?
could we spiral?
could you spiral?
could they spiral? 	could I be spiralling?
could you be spiralling?
could he be spiralling?
could we be spiralling?
could you be spiralling?
could they be spiralling? 	could I have spiralled?
could you have spiralled?
could he have spiralled?
could we have spiralled?
could you have spiralled?
could they have spiralled? 	could I have been spiralling?
could you have been spiralling?
could he have been spiralling?
could we have been spiralling?
could you have been spiralling?
could they have been spiralling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I spiral?
couldn't you spiral?
couldn't he spiral?
couldn't we spiral?
couldn't you spiral?
couldn't they spiral? 	couldn't I be spiralling?
couldn't you be spiralling?
couldn't he be spiralling?
couldn't we be spiralling?
couldn't you be spiralling?
couldn't they be spiralling? 	couldn't I have spiralled?
couldn't you have spiralled?
couldn't he have spiralled?
couldn't we have spiralled?
couldn't you have spiralled?
couldn't they have spiralled? 	couldn't I have been spiralling?
couldn't you have been spiralling?
couldn't he have been spiralling?
couldn't we have been spiralling?
couldn't you have been spiralling?
couldn't they have been spiralling?