English verb conjugation
MUST YEN

Regular verb: yen - yenned - yenned

Affirmation

Simple form	V-ing form
I must yen you must yen he must yen we must yen you must yen they must yen	I must be yenning you must be yenning he must be yenning we must be yenning you must be yenning they must be yenning
Perfect	V-ing perfect
I must have yenned you must have yenned he must have yenned we must have yenned you must have yenned they must have yenned	I must have been yenning you must have been yenning he must have been yenning we must have been yenning you must have been yenning they must have been yenning

Negation

Simple form	V-ing form
I must not yen you must not yen he must not yen we must not yen you must not yen they must not yen	I must not be yenning you must not be yenning he must not be yenning we must not be yenning you must not be yenning they must not be yenning
Perfect	V-ing perfect
I must not have yenned you must not have yenned he must not have yenned we must not have yenned you must not have yenned they must not have yenned	I must not have been yenning you must not have been yenning he must not have been yenning we must not have been yenning you must not have been yenning they must not have been yenning

Interrogative form

Simple form	V-ing form
must I yen? must you yen? must he yen? must we yen? must you yen? must they yen?	must I be yenning? must you be yenning? must he be yenning? must we be yenning? must you be yenning? must they be yenning?
Perfect	V-ing perfect
must I have yenned? must you have yenned? must he have yenned? must we have yenned? must you have yenned? must they have yenned?	must I have been yenning? must you have been yenning? must he have been yenning? must we have been yenning? must you have been yenning? must they have been yenning?

Interro-negative form

Simple form	V-ing form
must I not yen? must you not yen? must he not yen? must we not yen? must you not yen? must they not yen?	must I not be yenning? must you not be yenning? must he not be yenning? must we not be yenning? must you not be yenning? must they not be yenning?
Perfect	V-ing perfect
must I not have yenned? must you not have yenned? must he not have yenned? must we not have yenned? must you not have yenned? must they not have yenned?	must I not have been yenning? must you not have been yenning? must he not have been yenning? must we not have been yenning? must you not have been yenning? must they not have been yenning?