could uncap
Regular verb: uncap - uncapped- uncapped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could uncap
you could uncap
he could uncap
we could uncap
you could uncap
they could uncap 	I could be uncapping
you could be uncapping
he could be uncapping
we could be uncapping
you could be uncapping
they could be uncapping	I could have uncapped
you could have uncapped
he could have uncapped
we could have uncapped
you could have uncapped
they could have uncapped	I could have been uncapping
you could have been uncapping
he could have been uncapping
we could have been uncapping
you could have been uncapping
they could have been uncapping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't uncap
you couldn't uncap
he couldn't uncap
we couldn't uncap
you couldn't uncap
they couldn't uncap 	I couldn't be uncapping
you couldn't be uncapping
he couldn't be uncapping
we couldn't be uncapping
you couldn't be uncapping
they couldn't be uncapping	I couldn't have uncapped
you couldn't have uncapped
he couldn't have uncapped
we couldn't have uncapped
you couldn't have uncapped
they couldn't have uncapped	I couldn't have been uncapping
you couldn't have been uncapping
he couldn't have been uncapping
we couldn't have been uncapping
you couldn't have been uncapping
they couldn't have been uncapping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I uncap?
could you uncap?
could he uncap?
could we uncap?
could you uncap?
could they uncap? 	could I be uncapping?
could you be uncapping?
could he be uncapping?
could we be uncapping?
could you be uncapping?
could they be uncapping? 	could I have uncapped?
could you have uncapped?
could he have uncapped?
could we have uncapped?
could you have uncapped?
could they have uncapped? 	could I have been uncapping?
could you have been uncapping?
could he have been uncapping?
could we have been uncapping?
could you have been uncapping?
could they have been uncapping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I uncap?
couldn't you uncap?
couldn't he uncap?
couldn't we uncap?
couldn't you uncap?
couldn't they uncap? 	couldn't I be uncapping?
couldn't you be uncapping?
couldn't he be uncapping?
couldn't we be uncapping?
couldn't you be uncapping?
couldn't they be uncapping? 	couldn't I have uncapped?
couldn't you have uncapped?
couldn't he have uncapped?
couldn't we have uncapped?
couldn't you have uncapped?
couldn't they have uncapped? 	couldn't I have been uncapping?
couldn't you have been uncapping?
couldn't he have been uncapping?
couldn't we have been uncapping?
couldn't you have been uncapping?
couldn't they have been uncapping?