English verb conjugation
COULD YEARN

Regular verb: yearn - yearned - yearned

Affirmation

Simple form	V-ing form
I could yearn you could yearn he could yearn we could yearn you could yearn they could yearn	I could be yearning you could be yearning he 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 he 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 he 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 couldn't yearn you couldn't yearn he couldn't yearn we couldn't yearn you couldn't yearn they couldn't yearn	I couldn't be yearning you couldn't be yearning he couldn't be yearning we couldn't be yearning you couldn't be yearning they couldn't be yearning
Perfect	V-ing perfect
I couldn't have yearned you couldn't have yearned he couldn't have yearned we couldn't have yearned you couldn't have yearned they couldn't have yearned	I couldn't have been yearning you couldn't have been yearning he couldn't have been yearning we couldn't have been yearning you couldn't have been yearning they couldn't have been yearning

Interrogative form

Simple form	V-ing form
could I yearn? could you yearn? could he yearn? could we yearn? could you yearn? could they yearn?	could I be yearning? could you be yearning? could he 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 he 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 he 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
couldn't I yearn? couldn't you yearn? couldn't he yearn? couldn't we yearn? couldn't you yearn? couldn't they yearn?	couldn't I be yearning? couldn't you be yearning? couldn't he be yearning? couldn't we be yearning? couldn't you be yearning? couldn't they be yearning?
Perfect	V-ing perfect
couldn't I have yearned? couldn't you have yearned? couldn't he have yearned? couldn't we have yearned? couldn't you have yearned? couldn't they have yearned?	couldn't I have been yearning? couldn't you have been yearning? couldn't he have been yearning? couldn't we have been yearning? couldn't you have been yearning? couldn't they have been yearning?