English verb conjugation
MUST MUCK

Regular verb: muck - mucked - mucked

Affirmation

Simple form	V-ing form
I must muck you must muck he must muck we must muck you must muck they must muck	I must be mucking you must be mucking he must be mucking we must be mucking you must be mucking they must be mucking
Perfect	V-ing perfect
I must have mucked you must have mucked he must have mucked we must have mucked you must have mucked they must have mucked	I must have been mucking you must have been mucking he must have been mucking we must have been mucking you must have been mucking they must have been mucking

Negation

Simple form	V-ing form
I mustn't muck you mustn't muck he mustn't muck we mustn't muck you mustn't muck they mustn't muck	I mustn't be mucking you mustn't be mucking he mustn't be mucking we mustn't be mucking you mustn't be mucking they mustn't be mucking
Perfect	V-ing perfect
I mustn't have mucked you mustn't have mucked he mustn't have mucked we mustn't have mucked you mustn't have mucked they mustn't have mucked	I mustn't have been mucking you mustn't have been mucking he mustn't have been mucking we mustn't have been mucking you mustn't have been mucking they mustn't have been mucking

Interrogative form

Simple form	V-ing form
must I muck? must you muck? must he muck? must we muck? must you muck? must they muck?	must I be mucking? must you be mucking? must he be mucking? must we be mucking? must you be mucking? must they be mucking?
Perfect	V-ing perfect
must I have mucked? must you have mucked? must he have mucked? must we have mucked? must you have mucked? must they have mucked?	must I have been mucking? must you have been mucking? must he have been mucking? must we have been mucking? must you have been mucking? must they have been mucking?

Interro-negative form

Simple form	V-ing form
mustn't I muck? mustn't you muck? mustn't he muck? mustn't we muck? mustn't you muck? mustn't they muck?	mustn't I be mucking? mustn't you be mucking? mustn't he be mucking? mustn't we be mucking? mustn't you be mucking? mustn't they be mucking?
Perfect	V-ing perfect
mustn't I have mucked? mustn't you have mucked? mustn't he have mucked? mustn't we have mucked? mustn't you have mucked? mustn't they have mucked?	mustn't I have been mucking? mustn't you have been mucking? mustn't he have been mucking? mustn't we have been mucking? mustn't you have been mucking? mustn't they have been mucking?