English verb conjugation
MUST EFFACE

Regular verb: efface - effaced - effaced

Affirmation

Simple form	V-ing form
I must efface you must efface she must efface we must efface you must efface they must efface	I must be effacing you must be effacing she must be effacing we must be effacing you must be effacing they must be effacing
Perfect	V-ing perfect
I must have effaced you must have effaced she must have effaced we must have effaced you must have effaced they must have effaced	I must have been effacing you must have been effacing she must have been effacing we must have been effacing you must have been effacing they must have been effacing

Negation

Simple form	V-ing form
I must not efface you must not efface she must not efface we must not efface you must not efface they must not efface	I must not be effacing you must not be effacing she must not be effacing we must not be effacing you must not be effacing they must not be effacing
Perfect	V-ing perfect
I must not have effaced you must not have effaced she must not have effaced we must not have effaced you must not have effaced they must not have effaced	I must not have been effacing you must not have been effacing she must not have been effacing we must not have been effacing you must not have been effacing they must not have been effacing

Interrogative form

Simple form	V-ing form
must I efface? must you efface? must she efface? must we efface? must you efface? must they efface?	must I be effacing? must you be effacing? must she be effacing? must we be effacing? must you be effacing? must they be effacing?
Perfect	V-ing perfect
must I have effaced? must you have effaced? must she have effaced? must we have effaced? must you have effaced? must they have effaced?	must I have been effacing? must you have been effacing? must she have been effacing? must we have been effacing? must you have been effacing? must they have been effacing?

Interro-negative form

Simple form	V-ing form
must I not efface? must you not efface? must she not efface? must we not efface? must you not efface? must they not efface?	must I not be effacing? must you not be effacing? must she not be effacing? must we not be effacing? must you not be effacing? must they not be effacing?
Perfect	V-ing perfect
must I not have effaced? must you not have effaced? must she not have effaced? must we not have effaced? must you not have effaced? must they not have effaced?	must I not have been effacing? must you not have been effacing? must she not have been effacing? must we not have been effacing? must you not have been effacing? must they not have been effacing?