English verb conjugation
COULD MARGIN

Regular verb: margin - margined - margined

Affirmation

Simple form	V-ing form
I could margin you could margin he could margin we could margin you could margin they could margin	I could be margining you could be margining he could be margining we could be margining you could be margining they could be margining
Perfect	V-ing perfect
I could have margined you could have margined he could have margined we could have margined you could have margined they could have margined	I could have been margining you could have been margining he could have been margining we could have been margining you could have been margining they could have been margining

Negation

Simple form	V-ing form
I couldn't margin you couldn't margin he couldn't margin we couldn't margin you couldn't margin they couldn't margin	I couldn't be margining you couldn't be margining he couldn't be margining we couldn't be margining you couldn't be margining they couldn't be margining
Perfect	V-ing perfect
I couldn't have margined you couldn't have margined he couldn't have margined we couldn't have margined you couldn't have margined they couldn't have margined	I couldn't have been margining you couldn't have been margining he couldn't have been margining we couldn't have been margining you couldn't have been margining they couldn't have been margining

Interrogative form

Simple form	V-ing form
could I margin? could you margin? could he margin? could we margin? could you margin? could they margin?	could I be margining? could you be margining? could he be margining? could we be margining? could you be margining? could they be margining?
Perfect	V-ing perfect
could I have margined? could you have margined? could he have margined? could we have margined? could you have margined? could they have margined?	could I have been margining? could you have been margining? could he have been margining? could we have been margining? could you have been margining? could they have been margining?

Interro-negative form

Simple form	V-ing form
couldn't I margin? couldn't you margin? couldn't he margin? couldn't we margin? couldn't you margin? couldn't they margin?	couldn't I be margining? couldn't you be margining? couldn't he be margining? couldn't we be margining? couldn't you be margining? couldn't they be margining?
Perfect	V-ing perfect
couldn't I have margined? couldn't you have margined? couldn't he have margined? couldn't we have margined? couldn't you have margined? couldn't they have margined?	couldn't I have been margining? couldn't you have been margining? couldn't he have been margining? couldn't we have been margining? couldn't you have been margining? couldn't they have been margining?