could uncurl
Regular verb: uncurl - uncurled- uncurled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could uncurl
you could uncurl
he could uncurl
we could uncurl
you could uncurl
they could uncurl 	I could be uncurling
you could be uncurling
he could be uncurling
we could be uncurling
you could be uncurling
they could be uncurling	I could have uncurled
you could have uncurled
he could have uncurled
we could have uncurled
you could have uncurled
they could have uncurled	I could have been uncurling
you could have been uncurling
he could have been uncurling
we could have been uncurling
you could have been uncurling
they could have been uncurling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't uncurl
you couldn't uncurl
he couldn't uncurl
we couldn't uncurl
you couldn't uncurl
they couldn't uncurl 	I couldn't be uncurling
you couldn't be uncurling
he couldn't be uncurling
we couldn't be uncurling
you couldn't be uncurling
they couldn't be uncurling	I couldn't have uncurled
you couldn't have uncurled
he couldn't have uncurled
we couldn't have uncurled
you couldn't have uncurled
they couldn't have uncurled	I couldn't have been uncurling
you couldn't have been uncurling
he couldn't have been uncurling
we couldn't have been uncurling
you couldn't have been uncurling
they couldn't have been uncurling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I uncurl?
could you uncurl?
could he uncurl?
could we uncurl?
could you uncurl?
could they uncurl? 	could I be uncurling?
could you be uncurling?
could he be uncurling?
could we be uncurling?
could you be uncurling?
could they be uncurling? 	could I have uncurled?
could you have uncurled?
could he have uncurled?
could we have uncurled?
could you have uncurled?
could they have uncurled? 	could I have been uncurling?
could you have been uncurling?
could he have been uncurling?
could we have been uncurling?
could you have been uncurling?
could they have been uncurling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I uncurl?
couldn't you uncurl?
couldn't he uncurl?
couldn't we uncurl?
couldn't you uncurl?
couldn't they uncurl? 	couldn't I be uncurling?
couldn't you be uncurling?
couldn't he be uncurling?
couldn't we be uncurling?
couldn't you be uncurling?
couldn't they be uncurling? 	couldn't I have uncurled?
couldn't you have uncurled?
couldn't he have uncurled?
couldn't we have uncurled?
couldn't you have uncurled?
couldn't they have uncurled? 	couldn't I have been uncurling?
couldn't you have been uncurling?
couldn't he have been uncurling?
couldn't we have been uncurling?
couldn't you have been uncurling?
couldn't they have been uncurling?