English verb conjugation
COULD UNCROSS

Regular verb: uncross - uncrossed - uncrossed

Affirmation

Simple form	V-ing form
I could uncross you could uncross he could uncross we could uncross you could uncross they could uncross	I could be uncrossing you could be uncrossing he could be uncrossing we could be uncrossing you could be uncrossing they could be uncrossing
Perfect	V-ing perfect
I could have uncrossed you could have uncrossed he could have uncrossed we could have uncrossed you could have uncrossed they could have uncrossed	I could have been uncrossing you could have been uncrossing he could have been uncrossing we could have been uncrossing you could have been uncrossing they could have been uncrossing

Negation

Simple form	V-ing form
I couldn't uncross you couldn't uncross he couldn't uncross we couldn't uncross you couldn't uncross they couldn't uncross	I couldn't be uncrossing you couldn't be uncrossing he couldn't be uncrossing we couldn't be uncrossing you couldn't be uncrossing they couldn't be uncrossing
Perfect	V-ing perfect
I couldn't have uncrossed you couldn't have uncrossed he couldn't have uncrossed we couldn't have uncrossed you couldn't have uncrossed they couldn't have uncrossed	I couldn't have been uncrossing you couldn't have been uncrossing he couldn't have been uncrossing we couldn't have been uncrossing you couldn't have been uncrossing they couldn't have been uncrossing

Interrogative form

Simple form	V-ing form
could I uncross? could you uncross? could he uncross? could we uncross? could you uncross? could they uncross?	could I be uncrossing? could you be uncrossing? could he be uncrossing? could we be uncrossing? could you be uncrossing? could they be uncrossing?
Perfect	V-ing perfect
could I have uncrossed? could you have uncrossed? could he have uncrossed? could we have uncrossed? could you have uncrossed? could they have uncrossed?	could I have been uncrossing? could you have been uncrossing? could he have been uncrossing? could we have been uncrossing? could you have been uncrossing? could they have been uncrossing?

Interro-negative form

Simple form	V-ing form
couldn't I uncross? couldn't you uncross? couldn't he uncross? couldn't we uncross? couldn't you uncross? couldn't they uncross?	couldn't I be uncrossing? couldn't you be uncrossing? couldn't he be uncrossing? couldn't we be uncrossing? couldn't you be uncrossing? couldn't they be uncrossing?
Perfect	V-ing perfect
couldn't I have uncrossed? couldn't you have uncrossed? couldn't he have uncrossed? couldn't we have uncrossed? couldn't you have uncrossed? couldn't they have uncrossed?	couldn't I have been uncrossing? couldn't you have been uncrossing? couldn't he have been uncrossing? couldn't we have been uncrossing? couldn't you have been uncrossing? couldn't they have been uncrossing?