English verb conjugation
MUST MUCK

Regular verb: muck - mucked - mucked

Affirmation

Simple form	V-ing form
I must muck you must muck she must muck we must muck you must muck they must muck	I must be mucking you must be mucking she 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 she 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 she 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 she 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 she 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 she 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 she 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 she muck? must we muck? must you muck? must they muck?	must I be mucking? must you be mucking? must she 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 she 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 she 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 she 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 she 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 she 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 she have been mucking? mustn't we have been mucking? mustn't you have been mucking? mustn't they have been mucking?