could impale
Regular verb: impale - impaled- impaled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could impale
you could impale
she could impale
we could impale
you could impale
they could impale 	I could be impaling
you could be impaling
she could be impaling
we could be impaling
you could be impaling
they could be impaling	I could have impaled
you could have impaled
she could have impaled
we could have impaled
you could have impaled
they could have impaled	I could have been impaling
you could have been impaling
she could have been impaling
we could have been impaling
you could have been impaling
they could have been impaling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't impale
you couldn't impale
she couldn't impale
we couldn't impale
you couldn't impale
they couldn't impale 	I couldn't be impaling
you couldn't be impaling
she couldn't be impaling
we couldn't be impaling
you couldn't be impaling
they couldn't be impaling	I couldn't have impaled
you couldn't have impaled
she couldn't have impaled
we couldn't have impaled
you couldn't have impaled
they couldn't have impaled	I couldn't have been impaling
you couldn't have been impaling
she couldn't have been impaling
we couldn't have been impaling
you couldn't have been impaling
they couldn't have been impaling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I impale?
could you impale?
could she impale?
could we impale?
could you impale?
could they impale? 	could I be impaling?
could you be impaling?
could she be impaling?
could we be impaling?
could you be impaling?
could they be impaling? 	could I have impaled?
could you have impaled?
could she have impaled?
could we have impaled?
could you have impaled?
could they have impaled? 	could I have been impaling?
could you have been impaling?
could she have been impaling?
could we have been impaling?
could you have been impaling?
could they have been impaling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I impale?
couldn't you impale?
couldn't she impale?
couldn't we impale?
couldn't you impale?
couldn't they impale? 	couldn't I be impaling?
couldn't you be impaling?
couldn't she be impaling?
couldn't we be impaling?
couldn't you be impaling?
couldn't they be impaling? 	couldn't I have impaled?
couldn't you have impaled?
couldn't she have impaled?
couldn't we have impaled?
couldn't you have impaled?
couldn't they have impaled? 	couldn't I have been impaling?
couldn't you have been impaling?
couldn't she have been impaling?
couldn't we have been impaling?
couldn't you have been impaling?
couldn't they have been impaling?