English verb conjugation
COULD UNCURL

Regular verb: uncurl - uncurled - uncurled

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?