English verb conjugation
MUST ENDORSE

Regular verb: endorse - endorsed - endorsed

Affirmation

Simple form	V-ing form
I must endorse you must endorse he must endorse we must endorse you must endorse they must endorse	I must be endorsing you must be endorsing he must be endorsing we must be endorsing you must be endorsing they must be endorsing
Perfect	V-ing perfect
I must have endorsed you must have endorsed he must have endorsed we must have endorsed you must have endorsed they must have endorsed	I must have been endorsing you must have been endorsing he must have been endorsing we must have been endorsing you must have been endorsing they must have been endorsing

Negation

Simple form	V-ing form
I must not endorse you must not endorse he must not endorse we must not endorse you must not endorse they must not endorse	I must not be endorsing you must not be endorsing he must not be endorsing we must not be endorsing you must not be endorsing they must not be endorsing
Perfect	V-ing perfect
I must not have endorsed you must not have endorsed he must not have endorsed we must not have endorsed you must not have endorsed they must not have endorsed	I must not have been endorsing you must not have been endorsing he must not have been endorsing we must not have been endorsing you must not have been endorsing they must not have been endorsing

Interrogative form

Simple form	V-ing form
must I endorse? must you endorse? must he endorse? must we endorse? must you endorse? must they endorse?	must I be endorsing? must you be endorsing? must he be endorsing? must we be endorsing? must you be endorsing? must they be endorsing?
Perfect	V-ing perfect
must I have endorsed? must you have endorsed? must he have endorsed? must we have endorsed? must you have endorsed? must they have endorsed?	must I have been endorsing? must you have been endorsing? must he have been endorsing? must we have been endorsing? must you have been endorsing? must they have been endorsing?

Interro-negative form

Simple form	V-ing form
must I not endorse? must you not endorse? must he not endorse? must we not endorse? must you not endorse? must they not endorse?	must I not be endorsing? must you not be endorsing? must he not be endorsing? must we not be endorsing? must you not be endorsing? must they not be endorsing?
Perfect	V-ing perfect
must I not have endorsed? must you not have endorsed? must he not have endorsed? must we not have endorsed? must you not have endorsed? must they not have endorsed?	must I not have been endorsing? must you not have been endorsing? must he not have been endorsing? must we not have been endorsing? must you not have been endorsing? must they not have been endorsing?