English verb conjugation
COULD IMP

Regular verb: imp - imped - imped

Affirmation

Simple form	V-ing form
I could imp you could imp he could imp we could imp you could imp they could imp	I could be imping you could be imping he could be imping we could be imping you could be imping they could be imping
Perfect	V-ing perfect
I could have imped you could have imped he could have imped we could have imped you could have imped they could have imped	I could have been imping you could have been imping he could have been imping we could have been imping you could have been imping they could have been imping

Negation

Simple form	V-ing form
I couldn't imp you couldn't imp he couldn't imp we couldn't imp you couldn't imp they couldn't imp	I couldn't be imping you couldn't be imping he couldn't be imping we couldn't be imping you couldn't be imping they couldn't be imping
Perfect	V-ing perfect
I couldn't have imped you couldn't have imped he couldn't have imped we couldn't have imped you couldn't have imped they couldn't have imped	I couldn't have been imping you couldn't have been imping he couldn't have been imping we couldn't have been imping you couldn't have been imping they couldn't have been imping

Interrogative form

Simple form	V-ing form
could I imp? could you imp? could he imp? could we imp? could you imp? could they imp?	could I be imping? could you be imping? could he be imping? could we be imping? could you be imping? could they be imping?
Perfect	V-ing perfect
could I have imped? could you have imped? could he have imped? could we have imped? could you have imped? could they have imped?	could I have been imping? could you have been imping? could he have been imping? could we have been imping? could you have been imping? could they have been imping?

Interro-negative form

Simple form	V-ing form
couldn't I imp? couldn't you imp? couldn't he imp? couldn't we imp? couldn't you imp? couldn't they imp?	couldn't I be imping? couldn't you be imping? couldn't he be imping? couldn't we be imping? couldn't you be imping? couldn't they be imping?
Perfect	V-ing perfect
couldn't I have imped? couldn't you have imped? couldn't he have imped? couldn't we have imped? couldn't you have imped? couldn't they have imped?	couldn't I have been imping? couldn't you have been imping? couldn't he have been imping? couldn't we have been imping? couldn't you have been imping? couldn't they have been imping?