English verb conjugation
MUST YANK

Regular verb: yank - yanked - yanked

Affirmation

Simple form	V-ing form
I must yank you must yank she must yank we must yank you must yank they must yank	I must be yanking you must be yanking she must be yanking we must be yanking you must be yanking they must be yanking
Perfect	V-ing perfect
I must have yanked you must have yanked she must have yanked we must have yanked you must have yanked they must have yanked	I must have been yanking you must have been yanking she must have been yanking we must have been yanking you must have been yanking they must have been yanking

Negation

Simple form	V-ing form
I mustn't yank you mustn't yank she mustn't yank we mustn't yank you mustn't yank they mustn't yank	I mustn't be yanking you mustn't be yanking she mustn't be yanking we mustn't be yanking you mustn't be yanking they mustn't be yanking
Perfect	V-ing perfect
I mustn't have yanked you mustn't have yanked she mustn't have yanked we mustn't have yanked you mustn't have yanked they mustn't have yanked	I mustn't have been yanking you mustn't have been yanking she mustn't have been yanking we mustn't have been yanking you mustn't have been yanking they mustn't have been yanking

Interrogative form

Simple form	V-ing form
must I yank? must you yank? must she yank? must we yank? must you yank? must they yank?	must I be yanking? must you be yanking? must she be yanking? must we be yanking? must you be yanking? must they be yanking?
Perfect	V-ing perfect
must I have yanked? must you have yanked? must she have yanked? must we have yanked? must you have yanked? must they have yanked?	must I have been yanking? must you have been yanking? must she have been yanking? must we have been yanking? must you have been yanking? must they have been yanking?

Interro-negative form

Simple form	V-ing form
mustn't I yank? mustn't you yank? mustn't she yank? mustn't we yank? mustn't you yank? mustn't they yank?	mustn't I be yanking? mustn't you be yanking? mustn't she be yanking? mustn't we be yanking? mustn't you be yanking? mustn't they be yanking?
Perfect	V-ing perfect
mustn't I have yanked? mustn't you have yanked? mustn't she have yanked? mustn't we have yanked? mustn't you have yanked? mustn't they have yanked?	mustn't I have been yanking? mustn't you have been yanking? mustn't she have been yanking? mustn't we have been yanking? mustn't you have been yanking? mustn't they have been yanking?