English verb conjugation
COULD MAR

Regular verb: mar - marred - marred

Affirmation

Simple form	V-ing form
I could mar you could mar he could mar we could mar you could mar they could mar	I could be marring you could be marring he could be marring we could be marring you could be marring they could be marring
Perfect	V-ing perfect
I could have marred you could have marred he could have marred we could have marred you could have marred they could have marred	I could have been marring you could have been marring he could have been marring we could have been marring you could have been marring they could have been marring

Negation

Simple form	V-ing form
I couldn't mar you couldn't mar he couldn't mar we couldn't mar you couldn't mar they couldn't mar	I couldn't be marring you couldn't be marring he couldn't be marring we couldn't be marring you couldn't be marring they couldn't be marring
Perfect	V-ing perfect
I couldn't have marred you couldn't have marred he couldn't have marred we couldn't have marred you couldn't have marred they couldn't have marred	I couldn't have been marring you couldn't have been marring he couldn't have been marring we couldn't have been marring you couldn't have been marring they couldn't have been marring

Interrogative form

Simple form	V-ing form
could I mar? could you mar? could he mar? could we mar? could you mar? could they mar?	could I be marring? could you be marring? could he be marring? could we be marring? could you be marring? could they be marring?
Perfect	V-ing perfect
could I have marred? could you have marred? could he have marred? could we have marred? could you have marred? could they have marred?	could I have been marring? could you have been marring? could he have been marring? could we have been marring? could you have been marring? could they have been marring?

Interro-negative form

Simple form	V-ing form
couldn't I mar? couldn't you mar? couldn't he mar? couldn't we mar? couldn't you mar? couldn't they mar?	couldn't I be marring? couldn't you be marring? couldn't he be marring? couldn't we be marring? couldn't you be marring? couldn't they be marring?
Perfect	V-ing perfect
couldn't I have marred? couldn't you have marred? couldn't he have marred? couldn't we have marred? couldn't you have marred? couldn't they have marred?	couldn't I have been marring? couldn't you have been marring? couldn't he have been marring? couldn't we have been marring? couldn't you have been marring? couldn't they have been marring?