English verb conjugation
COULD INTERLINE

Regular verb: interline - interlined - interlined

Affirmation

Simple form	V-ing form
I could interline you could interline she could interline we could interline you could interline they could interline	I could be interlining you could be interlining she could be interlining we could be interlining you could be interlining they could be interlining
Perfect	V-ing perfect
I could have interlined you could have interlined she could have interlined we could have interlined you could have interlined they could have interlined	I could have been interlining you could have been interlining she could have been interlining we could have been interlining you could have been interlining they could have been interlining

Negation

Simple form	V-ing form
I could not interline you could not interline she could not interline we could not interline you could not interline they could not interline	I could not be interlining you could not be interlining she could not be interlining we could not be interlining you could not be interlining they could not be interlining
Perfect	V-ing perfect
I could not have interlined you could not have interlined she could not have interlined we could not have interlined you could not have interlined they could not have interlined	I could not have been interlining you could not have been interlining she could not have been interlining we could not have been interlining you could not have been interlining they could not have been interlining

Interrogative form

Simple form	V-ing form
could I interline? could you interline? could she interline? could we interline? could you interline? could they interline?	could I be interlining? could you be interlining? could she be interlining? could we be interlining? could you be interlining? could they be interlining?
Perfect	V-ing perfect
could I have interlined? could you have interlined? could she have interlined? could we have interlined? could you have interlined? could they have interlined?	could I have been interlining? could you have been interlining? could she have been interlining? could we have been interlining? could you have been interlining? could they have been interlining?

Interro-negative form

Simple form	V-ing form
could I not interline? could you not interline? could she not interline? could we not interline? could you not interline? could they not interline?	could I not be interlining? could you not be interlining? could she not be interlining? could we not be interlining? could you not be interlining? could they not be interlining?
Perfect	V-ing perfect
could I not have interlined? could you not have interlined? could she not have interlined? could we not have interlined? could you not have interlined? could they not have interlined?	could I not have been interlining? could you not have been interlining? could she not have been interlining? could we not have been interlining? could you not have been interlining? could they not have been interlining?