English verb conjugation
MUST YUK

Regular verb: yuk - yuked - yuked

Affirmation

Simple form	V-ing form
I must yuk you must yuk he must yuk we must yuk you must yuk they must yuk	I must be yuking you must be yuking he must be yuking we must be yuking you must be yuking they must be yuking
Perfect	V-ing perfect
I must have yuked you must have yuked he must have yuked we must have yuked you must have yuked they must have yuked	I must have been yuking you must have been yuking he must have been yuking we must have been yuking you must have been yuking they must have been yuking

Negation

Simple form	V-ing form
I mustn't yuk you mustn't yuk he mustn't yuk we mustn't yuk you mustn't yuk they mustn't yuk	I mustn't be yuking you mustn't be yuking he mustn't be yuking we mustn't be yuking you mustn't be yuking they mustn't be yuking
Perfect	V-ing perfect
I mustn't have yuked you mustn't have yuked he mustn't have yuked we mustn't have yuked you mustn't have yuked they mustn't have yuked	I mustn't have been yuking you mustn't have been yuking he mustn't have been yuking we mustn't have been yuking you mustn't have been yuking they mustn't have been yuking

Interrogative form

Simple form	V-ing form
must I yuk? must you yuk? must he yuk? must we yuk? must you yuk? must they yuk?	must I be yuking? must you be yuking? must he be yuking? must we be yuking? must you be yuking? must they be yuking?
Perfect	V-ing perfect
must I have yuked? must you have yuked? must he have yuked? must we have yuked? must you have yuked? must they have yuked?	must I have been yuking? must you have been yuking? must he have been yuking? must we have been yuking? must you have been yuking? must they have been yuking?

Interro-negative form

Simple form	V-ing form
mustn't I yuk? mustn't you yuk? mustn't he yuk? mustn't we yuk? mustn't you yuk? mustn't they yuk?	mustn't I be yuking? mustn't you be yuking? mustn't he be yuking? mustn't we be yuking? mustn't you be yuking? mustn't they be yuking?
Perfect	V-ing perfect
mustn't I have yuked? mustn't you have yuked? mustn't he have yuked? mustn't we have yuked? mustn't you have yuked? mustn't they have yuked?	mustn't I have been yuking? mustn't you have been yuking? mustn't he have been yuking? mustn't we have been yuking? mustn't you have been yuking? mustn't they have been yuking?