English verb conjugation
MUST LARK

Regular verb: lark - larked - larked

Affirmation

Simple form	V-ing form
I must lark you must lark he must lark we must lark you must lark they must lark	I must be larking you must be larking he must be larking we must be larking you must be larking they must be larking
Perfect	V-ing perfect
I must have larked you must have larked he must have larked we must have larked you must have larked they must have larked	I must have been larking you must have been larking he must have been larking we must have been larking you must have been larking they must have been larking

Negation

Simple form	V-ing form
I mustn't lark you mustn't lark he mustn't lark we mustn't lark you mustn't lark they mustn't lark	I mustn't be larking you mustn't be larking he mustn't be larking we mustn't be larking you mustn't be larking they mustn't be larking
Perfect	V-ing perfect
I mustn't have larked you mustn't have larked he mustn't have larked we mustn't have larked you mustn't have larked they mustn't have larked	I mustn't have been larking you mustn't have been larking he mustn't have been larking we mustn't have been larking you mustn't have been larking they mustn't have been larking

Interrogative form

Simple form	V-ing form
must I lark? must you lark? must he lark? must we lark? must you lark? must they lark?	must I be larking? must you be larking? must he be larking? must we be larking? must you be larking? must they be larking?
Perfect	V-ing perfect
must I have larked? must you have larked? must he have larked? must we have larked? must you have larked? must they have larked?	must I have been larking? must you have been larking? must he have been larking? must we have been larking? must you have been larking? must they have been larking?

Interro-negative form

Simple form	V-ing form
mustn't I lark? mustn't you lark? mustn't he lark? mustn't we lark? mustn't you lark? mustn't they lark?	mustn't I be larking? mustn't you be larking? mustn't he be larking? mustn't we be larking? mustn't you be larking? mustn't they be larking?
Perfect	V-ing perfect
mustn't I have larked? mustn't you have larked? mustn't he have larked? mustn't we have larked? mustn't you have larked? mustn't they have larked?	mustn't I have been larking? mustn't you have been larking? mustn't he have been larking? mustn't we have been larking? mustn't you have been larking? mustn't they have been larking?