English verb conjugation
MUST YEARN

Regular verb: yearn - yearned - yearned

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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