could tailspin
Regular verb: tailspin - tailspined- tailspined

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could tailspin
you could tailspin
she could tailspin
we could tailspin
you could tailspin
they could tailspin 	I could be tailspining
you could be tailspining
she could be tailspining
we could be tailspining
you could be tailspining
they could be tailspining	I could have tailspined
you could have tailspined
she could have tailspined
we could have tailspined
you could have tailspined
they could have tailspined	I could have been tailspining
you could have been tailspining
she could have been tailspining
we could have been tailspining
you could have been tailspining
they could have been tailspining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't tailspin
you couldn't tailspin
she couldn't tailspin
we couldn't tailspin
you couldn't tailspin
they couldn't tailspin 	I couldn't be tailspining
you couldn't be tailspining
she couldn't be tailspining
we couldn't be tailspining
you couldn't be tailspining
they couldn't be tailspining	I couldn't have tailspined
you couldn't have tailspined
she couldn't have tailspined
we couldn't have tailspined
you couldn't have tailspined
they couldn't have tailspined	I couldn't have been tailspining
you couldn't have been tailspining
she couldn't have been tailspining
we couldn't have been tailspining
you couldn't have been tailspining
they couldn't have been tailspining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I tailspin?
could you tailspin?
could she tailspin?
could we tailspin?
could you tailspin?
could they tailspin? 	could I be tailspining?
could you be tailspining?
could she be tailspining?
could we be tailspining?
could you be tailspining?
could they be tailspining? 	could I have tailspined?
could you have tailspined?
could she have tailspined?
could we have tailspined?
could you have tailspined?
could they have tailspined? 	could I have been tailspining?
could you have been tailspining?
could she have been tailspining?
could we have been tailspining?
could you have been tailspining?
could they have been tailspining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I tailspin?
couldn't you tailspin?
couldn't she tailspin?
couldn't we tailspin?
couldn't you tailspin?
couldn't they tailspin? 	couldn't I be tailspining?
couldn't you be tailspining?
couldn't she be tailspining?
couldn't we be tailspining?
couldn't you be tailspining?
couldn't they be tailspining? 	couldn't I have tailspined?
couldn't you have tailspined?
couldn't she have tailspined?
couldn't we have tailspined?
couldn't you have tailspined?
couldn't they have tailspined? 	couldn't I have been tailspining?
couldn't you have been tailspining?
couldn't she have been tailspining?
couldn't we have been tailspining?
couldn't you have been tailspining?
couldn't they have been tailspining?