could skyrocket
Regular verb: skyrocket - skyrocketed- skyrocketed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could skyrocket
you could skyrocket
he could skyrocket
we could skyrocket
you could skyrocket
they could skyrocket 	I could be skyrocketing
you could be skyrocketing
he could be skyrocketing
we could be skyrocketing
you could be skyrocketing
they could be skyrocketing	I could have skyrocketed
you could have skyrocketed
he could have skyrocketed
we could have skyrocketed
you could have skyrocketed
they could have skyrocketed	I could have been skyrocketing
you could have been skyrocketing
he could have been skyrocketing
we could have been skyrocketing
you could have been skyrocketing
they could have been skyrocketing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't skyrocket
you couldn't skyrocket
he couldn't skyrocket
we couldn't skyrocket
you couldn't skyrocket
they couldn't skyrocket 	I couldn't be skyrocketing
you couldn't be skyrocketing
he couldn't be skyrocketing
we couldn't be skyrocketing
you couldn't be skyrocketing
they couldn't be skyrocketing	I couldn't have skyrocketed
you couldn't have skyrocketed
he couldn't have skyrocketed
we couldn't have skyrocketed
you couldn't have skyrocketed
they couldn't have skyrocketed	I couldn't have been skyrocketing
you couldn't have been skyrocketing
he couldn't have been skyrocketing
we couldn't have been skyrocketing
you couldn't have been skyrocketing
they couldn't have been skyrocketing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I skyrocket?
could you skyrocket?
could he skyrocket?
could we skyrocket?
could you skyrocket?
could they skyrocket? 	could I be skyrocketing?
could you be skyrocketing?
could he be skyrocketing?
could we be skyrocketing?
could you be skyrocketing?
could they be skyrocketing? 	could I have skyrocketed?
could you have skyrocketed?
could he have skyrocketed?
could we have skyrocketed?
could you have skyrocketed?
could they have skyrocketed? 	could I have been skyrocketing?
could you have been skyrocketing?
could he have been skyrocketing?
could we have been skyrocketing?
could you have been skyrocketing?
could they have been skyrocketing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I skyrocket?
couldn't you skyrocket?
couldn't he skyrocket?
couldn't we skyrocket?
couldn't you skyrocket?
couldn't they skyrocket? 	couldn't I be skyrocketing?
couldn't you be skyrocketing?
couldn't he be skyrocketing?
couldn't we be skyrocketing?
couldn't you be skyrocketing?
couldn't they be skyrocketing? 	couldn't I have skyrocketed?
couldn't you have skyrocketed?
couldn't he have skyrocketed?
couldn't we have skyrocketed?
couldn't you have skyrocketed?
couldn't they have skyrocketed? 	couldn't I have been skyrocketing?
couldn't you have been skyrocketing?
couldn't he have been skyrocketing?
couldn't we have been skyrocketing?
couldn't you have been skyrocketing?
couldn't they have been skyrocketing?