English verb conjugation
COULD COFFIN

Regular verb: coffin - coffined - coffined

Affirmation

Simple form	V-ing form
I could coffin you could coffin he could coffin we could coffin you could coffin they could coffin	I could be coffining you could be coffining he could be coffining we could be coffining you could be coffining they could be coffining
Perfect	V-ing perfect
I could have coffined you could have coffined he could have coffined we could have coffined you could have coffined they could have coffined	I could have been coffining you could have been coffining he could have been coffining we could have been coffining you could have been coffining they could have been coffining

Negation

Simple form	V-ing form
I couldn't coffin you couldn't coffin he couldn't coffin we couldn't coffin you couldn't coffin they couldn't coffin	I couldn't be coffining you couldn't be coffining he couldn't be coffining we couldn't be coffining you couldn't be coffining they couldn't be coffining
Perfect	V-ing perfect
I couldn't have coffined you couldn't have coffined he couldn't have coffined we couldn't have coffined you couldn't have coffined they couldn't have coffined	I couldn't have been coffining you couldn't have been coffining he couldn't have been coffining we couldn't have been coffining you couldn't have been coffining they couldn't have been coffining

Interrogative form

Simple form	V-ing form
could I coffin? could you coffin? could he coffin? could we coffin? could you coffin? could they coffin?	could I be coffining? could you be coffining? could he be coffining? could we be coffining? could you be coffining? could they be coffining?
Perfect	V-ing perfect
could I have coffined? could you have coffined? could he have coffined? could we have coffined? could you have coffined? could they have coffined?	could I have been coffining? could you have been coffining? could he have been coffining? could we have been coffining? could you have been coffining? could they have been coffining?

Interro-negative form

Simple form	V-ing form
couldn't I coffin? couldn't you coffin? couldn't he coffin? couldn't we coffin? couldn't you coffin? couldn't they coffin?	couldn't I be coffining? couldn't you be coffining? couldn't he be coffining? couldn't we be coffining? couldn't you be coffining? couldn't they be coffining?
Perfect	V-ing perfect
couldn't I have coffined? couldn't you have coffined? couldn't he have coffined? couldn't we have coffined? couldn't you have coffined? couldn't they have coffined?	couldn't I have been coffining? couldn't you have been coffining? couldn't he have been coffining? couldn't we have been coffining? couldn't you have been coffining? couldn't they have been coffining?