English verb conjugation
MUST FRILL

Regular verb: frill - frilled - frilled

Affirmation

Simple form	V-ing form
I must frill you must frill he must frill we must frill you must frill they must frill	I must be frilling you must be frilling he must be frilling we must be frilling you must be frilling they must be frilling
Perfect	V-ing perfect
I must have frilled you must have frilled he must have frilled we must have frilled you must have frilled they must have frilled	I must have been frilling you must have been frilling he must have been frilling we must have been frilling you must have been frilling they must have been frilling

Negation

Simple form	V-ing form
I mustn't frill you mustn't frill he mustn't frill we mustn't frill you mustn't frill they mustn't frill	I mustn't be frilling you mustn't be frilling he mustn't be frilling we mustn't be frilling you mustn't be frilling they mustn't be frilling
Perfect	V-ing perfect
I mustn't have frilled you mustn't have frilled he mustn't have frilled we mustn't have frilled you mustn't have frilled they mustn't have frilled	I mustn't have been frilling you mustn't have been frilling he mustn't have been frilling we mustn't have been frilling you mustn't have been frilling they mustn't have been frilling

Interrogative form

Simple form	V-ing form
must I frill? must you frill? must he frill? must we frill? must you frill? must they frill?	must I be frilling? must you be frilling? must he be frilling? must we be frilling? must you be frilling? must they be frilling?
Perfect	V-ing perfect
must I have frilled? must you have frilled? must he have frilled? must we have frilled? must you have frilled? must they have frilled?	must I have been frilling? must you have been frilling? must he have been frilling? must we have been frilling? must you have been frilling? must they have been frilling?

Interro-negative form

Simple form	V-ing form
mustn't I frill? mustn't you frill? mustn't he frill? mustn't we frill? mustn't you frill? mustn't they frill?	mustn't I be frilling? mustn't you be frilling? mustn't he be frilling? mustn't we be frilling? mustn't you be frilling? mustn't they be frilling?
Perfect	V-ing perfect
mustn't I have frilled? mustn't you have frilled? mustn't he have frilled? mustn't we have frilled? mustn't you have frilled? mustn't they have frilled?	mustn't I have been frilling? mustn't you have been frilling? mustn't he have been frilling? mustn't we have been frilling? mustn't you have been frilling? mustn't they have been frilling?