English verb conjugation
MUST LIP

Regular verb: lip - liped - liped

Affirmation

Simple form	V-ing form
I must lip you must lip she must lip we must lip you must lip they must lip	I must be liping you must be liping she must be liping we must be liping you must be liping they must be liping
Perfect	V-ing perfect
I must have liped you must have liped she must have liped we must have liped you must have liped they must have liped	I must have been liping you must have been liping she must have been liping we must have been liping you must have been liping they must have been liping

Negation

Simple form	V-ing form
I mustn't lip you mustn't lip she mustn't lip we mustn't lip you mustn't lip they mustn't lip	I mustn't be liping you mustn't be liping she mustn't be liping we mustn't be liping you mustn't be liping they mustn't be liping
Perfect	V-ing perfect
I mustn't have liped you mustn't have liped she mustn't have liped we mustn't have liped you mustn't have liped they mustn't have liped	I mustn't have been liping you mustn't have been liping she mustn't have been liping we mustn't have been liping you mustn't have been liping they mustn't have been liping

Interrogative form

Simple form	V-ing form
must I lip? must you lip? must she lip? must we lip? must you lip? must they lip?	must I be liping? must you be liping? must she be liping? must we be liping? must you be liping? must they be liping?
Perfect	V-ing perfect
must I have liped? must you have liped? must she have liped? must we have liped? must you have liped? must they have liped?	must I have been liping? must you have been liping? must she have been liping? must we have been liping? must you have been liping? must they have been liping?

Interro-negative form

Simple form	V-ing form
mustn't I lip? mustn't you lip? mustn't she lip? mustn't we lip? mustn't you lip? mustn't they lip?	mustn't I be liping? mustn't you be liping? mustn't she be liping? mustn't we be liping? mustn't you be liping? mustn't they be liping?
Perfect	V-ing perfect
mustn't I have liped? mustn't you have liped? mustn't she have liped? mustn't we have liped? mustn't you have liped? mustn't they have liped?	mustn't I have been liping? mustn't you have been liping? mustn't she have been liping? mustn't we have been liping? mustn't you have been liping? mustn't they have been liping?