English verb conjugation
COULD YEARN

Regular verb: yearn - yearned - yearned

Affirmation

Simple form	V-ing form
I could yearn you could yearn she could yearn we could yearn you could yearn they could yearn	I could be yearning you could be yearning she could be yearning we could be yearning you could be yearning they could be yearning
Perfect	V-ing perfect
I could have yearned you could have yearned she could have yearned we could have yearned you could have yearned they could have yearned	I could have been yearning you could have been yearning she could have been yearning we could have been yearning you could have been yearning they could have been yearning

Negation

Simple form	V-ing form
I could not yearn you could not yearn she could not yearn we could not yearn you could not yearn they could not yearn	I could not be yearning you could not be yearning she could not be yearning we could not be yearning you could not be yearning they could not be yearning
Perfect	V-ing perfect
I could not have yearned you could not have yearned she could not have yearned we could not have yearned you could not have yearned they could not have yearned	I could not have been yearning you could not have been yearning she could not have been yearning we could not have been yearning you could not have been yearning they could not have been yearning

Interrogative form

Simple form	V-ing form
could I yearn? could you yearn? could she yearn? could we yearn? could you yearn? could they yearn?	could I be yearning? could you be yearning? could she be yearning? could we be yearning? could you be yearning? could they be yearning?
Perfect	V-ing perfect
could I have yearned? could you have yearned? could she have yearned? could we have yearned? could you have yearned? could they have yearned?	could I have been yearning? could you have been yearning? could she have been yearning? could we have been yearning? could you have been yearning? could they have been yearning?

Interro-negative form

Simple form	V-ing form
could I not yearn? could you not yearn? could she not yearn? could we not yearn? could you not yearn? could they not yearn?	could I not be yearning? could you not be yearning? could she not be yearning? could we not be yearning? could you not be yearning? could they not be yearning?
Perfect	V-ing perfect
could I not have yearned? could you not have yearned? could she not have yearned? could we not have yearned? could you not have yearned? could they not have yearned?	could I not have been yearning? could you not have been yearning? could she not have been yearning? could we not have been yearning? could you not have been yearning? could they not have been yearning?