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 must not yuk you must not yuk he must not yuk we must not yuk you must not yuk they must not yuk	I must not be yuking you must not be yuking he must not be yuking we must not be yuking you must not be yuking they must not be yuking
Perfect	V-ing perfect
I must not have yuked you must not have yuked he must not have yuked we must not have yuked you must not have yuked they must not have yuked	I must not have been yuking you must not have been yuking he must not have been yuking we must not have been yuking you must not have been yuking they must not 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
must I not yuk? must you not yuk? must he not yuk? must we not yuk? must you not yuk? must they not yuk?	must I not be yuking? must you not be yuking? must he not be yuking? must we not be yuking? must you not be yuking? must they not be yuking?
Perfect	V-ing perfect
must I not have yuked? must you not have yuked? must he not have yuked? must we not have yuked? must you not have yuked? must they not have yuked?	must I not have been yuking? must you not have been yuking? must he not have been yuking? must we not have been yuking? must you not have been yuking? must they not have been yuking?