English verb conjugation
COULD COIL

Regular verb: coil - coiled - coiled

Affirmation

Simple form	V-ing form
I could coil you could coil he could coil we could coil you could coil they could coil	I could be coiling you could be coiling he could be coiling we could be coiling you could be coiling they could be coiling
Perfect	V-ing perfect
I could have coiled you could have coiled he could have coiled we could have coiled you could have coiled they could have coiled	I could have been coiling you could have been coiling he could have been coiling we could have been coiling you could have been coiling they could have been coiling

Negation

Simple form	V-ing form
I couldn't coil you couldn't coil he couldn't coil we couldn't coil you couldn't coil they couldn't coil	I couldn't be coiling you couldn't be coiling he couldn't be coiling we couldn't be coiling you couldn't be coiling they couldn't be coiling
Perfect	V-ing perfect
I couldn't have coiled you couldn't have coiled he couldn't have coiled we couldn't have coiled you couldn't have coiled they couldn't have coiled	I couldn't have been coiling you couldn't have been coiling he couldn't have been coiling we couldn't have been coiling you couldn't have been coiling they couldn't have been coiling

Interrogative form

Simple form	V-ing form
could I coil? could you coil? could he coil? could we coil? could you coil? could they coil?	could I be coiling? could you be coiling? could he be coiling? could we be coiling? could you be coiling? could they be coiling?
Perfect	V-ing perfect
could I have coiled? could you have coiled? could he have coiled? could we have coiled? could you have coiled? could they have coiled?	could I have been coiling? could you have been coiling? could he have been coiling? could we have been coiling? could you have been coiling? could they have been coiling?

Interro-negative form

Simple form	V-ing form
couldn't I coil? couldn't you coil? couldn't he coil? couldn't we coil? couldn't you coil? couldn't they coil?	couldn't I be coiling? couldn't you be coiling? couldn't he be coiling? couldn't we be coiling? couldn't you be coiling? couldn't they be coiling?
Perfect	V-ing perfect
couldn't I have coiled? couldn't you have coiled? couldn't he have coiled? couldn't we have coiled? couldn't you have coiled? couldn't they have coiled?	couldn't I have been coiling? couldn't you have been coiling? couldn't he have been coiling? couldn't we have been coiling? couldn't you have been coiling? couldn't they have been coiling?