English verb conjugation
MUST LAPSE

Regular verb: lapse - lapsed - lapsed

Affirmation

Simple form	V-ing form
I must lapse you must lapse she must lapse we must lapse you must lapse they must lapse	I must be lapsing you must be lapsing she must be lapsing we must be lapsing you must be lapsing they must be lapsing
Perfect	V-ing perfect
I must have lapsed you must have lapsed she must have lapsed we must have lapsed you must have lapsed they must have lapsed	I must have been lapsing you must have been lapsing she must have been lapsing we must have been lapsing you must have been lapsing they must have been lapsing

Negation

Simple form	V-ing form
I must not lapse you must not lapse she must not lapse we must not lapse you must not lapse they must not lapse	I must not be lapsing you must not be lapsing she must not be lapsing we must not be lapsing you must not be lapsing they must not be lapsing
Perfect	V-ing perfect
I must not have lapsed you must not have lapsed she must not have lapsed we must not have lapsed you must not have lapsed they must not have lapsed	I must not have been lapsing you must not have been lapsing she must not have been lapsing we must not have been lapsing you must not have been lapsing they must not have been lapsing

Interrogative form

Simple form	V-ing form
must I lapse? must you lapse? must she lapse? must we lapse? must you lapse? must they lapse?	must I be lapsing? must you be lapsing? must she be lapsing? must we be lapsing? must you be lapsing? must they be lapsing?
Perfect	V-ing perfect
must I have lapsed? must you have lapsed? must she have lapsed? must we have lapsed? must you have lapsed? must they have lapsed?	must I have been lapsing? must you have been lapsing? must she have been lapsing? must we have been lapsing? must you have been lapsing? must they have been lapsing?

Interro-negative form

Simple form	V-ing form
must I not lapse? must you not lapse? must she not lapse? must we not lapse? must you not lapse? must they not lapse?	must I not be lapsing? must you not be lapsing? must she not be lapsing? must we not be lapsing? must you not be lapsing? must they not be lapsing?
Perfect	V-ing perfect
must I not have lapsed? must you not have lapsed? must she not have lapsed? must we not have lapsed? must you not have lapsed? must they not have lapsed?	must I not have been lapsing? must you not have been lapsing? must she not have been lapsing? must we not have been lapsing? must you not have been lapsing? must they not have been lapsing?