could four-wheel
Regular verb: four-wheel - four-wheeled- four-wheeled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could four-wheel
you could four-wheel
he could four-wheel
we could four-wheel
you could four-wheel
they could four-wheel 	I could be four-wheeling
you could be four-wheeling
he could be four-wheeling
we could be four-wheeling
you could be four-wheeling
they could be four-wheeling	I could have four-wheeled
you could have four-wheeled
he could have four-wheeled
we could have four-wheeled
you could have four-wheeled
they could have four-wheeled	I could have been four-wheeling
you could have been four-wheeling
he could have been four-wheeling
we could have been four-wheeling
you could have been four-wheeling
they could have been four-wheeling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't four-wheel
you couldn't four-wheel
he couldn't four-wheel
we couldn't four-wheel
you couldn't four-wheel
they couldn't four-wheel 	I couldn't be four-wheeling
you couldn't be four-wheeling
he couldn't be four-wheeling
we couldn't be four-wheeling
you couldn't be four-wheeling
they couldn't be four-wheeling	I couldn't have four-wheeled
you couldn't have four-wheeled
he couldn't have four-wheeled
we couldn't have four-wheeled
you couldn't have four-wheeled
they couldn't have four-wheeled	I couldn't have been four-wheeling
you couldn't have been four-wheeling
he couldn't have been four-wheeling
we couldn't have been four-wheeling
you couldn't have been four-wheeling
they couldn't have been four-wheeling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I four-wheel?
could you four-wheel?
could he four-wheel?
could we four-wheel?
could you four-wheel?
could they four-wheel? 	could I be four-wheeling?
could you be four-wheeling?
could he be four-wheeling?
could we be four-wheeling?
could you be four-wheeling?
could they be four-wheeling? 	could I have four-wheeled?
could you have four-wheeled?
could he have four-wheeled?
could we have four-wheeled?
could you have four-wheeled?
could they have four-wheeled? 	could I have been four-wheeling?
could you have been four-wheeling?
could he have been four-wheeling?
could we have been four-wheeling?
could you have been four-wheeling?
could they have been four-wheeling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I four-wheel?
couldn't you four-wheel?
couldn't he four-wheel?
couldn't we four-wheel?
couldn't you four-wheel?
couldn't they four-wheel? 	couldn't I be four-wheeling?
couldn't you be four-wheeling?
couldn't he be four-wheeling?
couldn't we be four-wheeling?
couldn't you be four-wheeling?
couldn't they be four-wheeling? 	couldn't I have four-wheeled?
couldn't you have four-wheeled?
couldn't he have four-wheeled?
couldn't we have four-wheeled?
couldn't you have four-wheeled?
couldn't they have four-wheeled? 	couldn't I have been four-wheeling?
couldn't you have been four-wheeling?
couldn't he have been four-wheeling?
couldn't we have been four-wheeling?
couldn't you have been four-wheeling?
couldn't they have been four-wheeling?