English verb conjugation
MUST KERN

Regular verb: kern - kerned - kerned

Affirmation

Simple form	V-ing form
I must kern you must kern he must kern we must kern you must kern they must kern	I must be kerning you must be kerning he must be kerning we must be kerning you must be kerning they must be kerning
Perfect	V-ing perfect
I must have kerned you must have kerned he must have kerned we must have kerned you must have kerned they must have kerned	I must have been kerning you must have been kerning he must have been kerning we must have been kerning you must have been kerning they must have been kerning

Negation

Simple form	V-ing form
I mustn't kern you mustn't kern he mustn't kern we mustn't kern you mustn't kern they mustn't kern	I mustn't be kerning you mustn't be kerning he mustn't be kerning we mustn't be kerning you mustn't be kerning they mustn't be kerning
Perfect	V-ing perfect
I mustn't have kerned you mustn't have kerned he mustn't have kerned we mustn't have kerned you mustn't have kerned they mustn't have kerned	I mustn't have been kerning you mustn't have been kerning he mustn't have been kerning we mustn't have been kerning you mustn't have been kerning they mustn't have been kerning

Interrogative form

Simple form	V-ing form
must I kern? must you kern? must he kern? must we kern? must you kern? must they kern?	must I be kerning? must you be kerning? must he be kerning? must we be kerning? must you be kerning? must they be kerning?
Perfect	V-ing perfect
must I have kerned? must you have kerned? must he have kerned? must we have kerned? must you have kerned? must they have kerned?	must I have been kerning? must you have been kerning? must he have been kerning? must we have been kerning? must you have been kerning? must they have been kerning?

Interro-negative form

Simple form	V-ing form
mustn't I kern? mustn't you kern? mustn't he kern? mustn't we kern? mustn't you kern? mustn't they kern?	mustn't I be kerning? mustn't you be kerning? mustn't he be kerning? mustn't we be kerning? mustn't you be kerning? mustn't they be kerning?
Perfect	V-ing perfect
mustn't I have kerned? mustn't you have kerned? mustn't he have kerned? mustn't we have kerned? mustn't you have kerned? mustn't they have kerned?	mustn't I have been kerning? mustn't you have been kerning? mustn't he have been kerning? mustn't we have been kerning? mustn't you have been kerning? mustn't they have been kerning?