English verb conjugation
MUST DO IT YOURSELF

Regular verb: do it yourself - do it yourselfed - do it yourselfed

Warning, this verb may not exist. Conjugation is given as example.

Affirmation

Simple form	V-ing form
I must do it yourself you must do it yourself he must do it yourself we must do it yourself you must do it yourself they must do it yourself	I must be do it yourselfing you must be do it yourselfing he must be do it yourselfing we must be do it yourselfing you must be do it yourselfing they must be do it yourselfing
Perfect	V-ing perfect
I must have do it yourselfed you must have do it yourselfed he must have do it yourselfed we must have do it yourselfed you must have do it yourselfed they must have do it yourselfed	I must have been do it yourselfing you must have been do it yourselfing he must have been do it yourselfing we must have been do it yourselfing you must have been do it yourselfing they must have been do it yourselfing

Negation

Simple form	V-ing form
I must not do it yourself you must not do it yourself he must not do it yourself we must not do it yourself you must not do it yourself they must not do it yourself	I must not be do it yourselfing you must not be do it yourselfing he must not be do it yourselfing we must not be do it yourselfing you must not be do it yourselfing they must not be do it yourselfing
Perfect	V-ing perfect
I must not have do it yourselfed you must not have do it yourselfed he must not have do it yourselfed we must not have do it yourselfed you must not have do it yourselfed they must not have do it yourselfed	I must not have been do it yourselfing you must not have been do it yourselfing he must not have been do it yourselfing we must not have been do it yourselfing you must not have been do it yourselfing they must not have been do it yourselfing

Interrogative form

Simple form	V-ing form
must I do it yourself? must you do it yourself? must he do it yourself? must we do it yourself? must you do it yourself? must they do it yourself?	must I be do it yourselfing? must you be do it yourselfing? must he be do it yourselfing? must we be do it yourselfing? must you be do it yourselfing? must they be do it yourselfing?
Perfect	V-ing perfect
must I have do it yourselfed? must you have do it yourselfed? must he have do it yourselfed? must we have do it yourselfed? must you have do it yourselfed? must they have do it yourselfed?	must I have been do it yourselfing? must you have been do it yourselfing? must he have been do it yourselfing? must we have been do it yourselfing? must you have been do it yourselfing? must they have been do it yourselfing?

Interro-negative form

Simple form	V-ing form
must I not do it yourself? must you not do it yourself? must he not do it yourself? must we not do it yourself? must you not do it yourself? must they not do it yourself?	must I not be do it yourselfing? must you not be do it yourselfing? must he not be do it yourselfing? must we not be do it yourselfing? must you not be do it yourselfing? must they not be do it yourselfing?
Perfect	V-ing perfect
must I not have do it yourselfed? must you not have do it yourselfed? must he not have do it yourselfed? must we not have do it yourselfed? must you not have do it yourselfed? must they not have do it yourselfed?	must I not have been do it yourselfing? must you not have been do it yourselfing? must he not have been do it yourselfing? must we not have been do it yourselfing? must you not have been do it yourselfing? must they not have been do it yourselfing?