English verb conjugation
MUST LAP

Regular verb: lap - lapped - lapped

Affirmation

Simple form	V-ing form
I must lap you must lap she must lap we must lap you must lap they must lap	I must be lapping you must be lapping she must be lapping we must be lapping you must be lapping they must be lapping
Perfect	V-ing perfect
I must have lapped you must have lapped she must have lapped we must have lapped you must have lapped they must have lapped	I must have been lapping you must have been lapping she must have been lapping we must have been lapping you must have been lapping they must have been lapping

Negation

Simple form	V-ing form
I mustn't lap you mustn't lap she mustn't lap we mustn't lap you mustn't lap they mustn't lap	I mustn't be lapping you mustn't be lapping she mustn't be lapping we mustn't be lapping you mustn't be lapping they mustn't be lapping
Perfect	V-ing perfect
I mustn't have lapped you mustn't have lapped she mustn't have lapped we mustn't have lapped you mustn't have lapped they mustn't have lapped	I mustn't have been lapping you mustn't have been lapping she mustn't have been lapping we mustn't have been lapping you mustn't have been lapping they mustn't have been lapping

Interrogative form

Simple form	V-ing form
must I lap? must you lap? must she lap? must we lap? must you lap? must they lap?	must I be lapping? must you be lapping? must she be lapping? must we be lapping? must you be lapping? must they be lapping?
Perfect	V-ing perfect
must I have lapped? must you have lapped? must she have lapped? must we have lapped? must you have lapped? must they have lapped?	must I have been lapping? must you have been lapping? must she have been lapping? must we have been lapping? must you have been lapping? must they have been lapping?

Interro-negative form

Simple form	V-ing form
mustn't I lap? mustn't you lap? mustn't she lap? mustn't we lap? mustn't you lap? mustn't they lap?	mustn't I be lapping? mustn't you be lapping? mustn't she be lapping? mustn't we be lapping? mustn't you be lapping? mustn't they be lapping?
Perfect	V-ing perfect
mustn't I have lapped? mustn't you have lapped? mustn't she have lapped? mustn't we have lapped? mustn't you have lapped? mustn't they have lapped?	mustn't I have been lapping? mustn't you have been lapping? mustn't she have been lapping? mustn't we have been lapping? mustn't you have been lapping? mustn't they have been lapping?