English verb conjugation
MUST LAPSE

Regular verb: lapse - lapsed - lapsed

Affirmation

Simple form	V-ing form
I must lapse you must lapse he must lapse we must lapse you must lapse they must lapse	I must be lapsing you must be lapsing he 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 he 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 he 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 mustn't lapse you mustn't lapse he mustn't lapse we mustn't lapse you mustn't lapse they mustn't lapse	I mustn't be lapsing you mustn't be lapsing he mustn't be lapsing we mustn't be lapsing you mustn't be lapsing they mustn't be lapsing
Perfect	V-ing perfect
I mustn't have lapsed you mustn't have lapsed he mustn't have lapsed we mustn't have lapsed you mustn't have lapsed they mustn't have lapsed	I mustn't have been lapsing you mustn't have been lapsing he mustn't have been lapsing we mustn't have been lapsing you mustn't have been lapsing they mustn't have been lapsing

Interrogative form

Simple form	V-ing form
must I lapse? must you lapse? must he lapse? must we lapse? must you lapse? must they lapse?	must I be lapsing? must you be lapsing? must he 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 he 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 he 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
mustn't I lapse? mustn't you lapse? mustn't he lapse? mustn't we lapse? mustn't you lapse? mustn't they lapse?	mustn't I be lapsing? mustn't you be lapsing? mustn't he be lapsing? mustn't we be lapsing? mustn't you be lapsing? mustn't they be lapsing?
Perfect	V-ing perfect
mustn't I have lapsed? mustn't you have lapsed? mustn't he have lapsed? mustn't we have lapsed? mustn't you have lapsed? mustn't they have lapsed?	mustn't I have been lapsing? mustn't you have been lapsing? mustn't he have been lapsing? mustn't we have been lapsing? mustn't you have been lapsing? mustn't they have been lapsing?