English verb conjugation
MUST NECK

Regular verb: neck - necked - necked

Affirmation

Simple form	V-ing form
I must neck you must neck he must neck we must neck you must neck they must neck	I must be necking you must be necking he must be necking we must be necking you must be necking they must be necking
Perfect	V-ing perfect
I must have necked you must have necked he must have necked we must have necked you must have necked they must have necked	I must have been necking you must have been necking he must have been necking we must have been necking you must have been necking they must have been necking

Negation

Simple form	V-ing form
I mustn't neck you mustn't neck he mustn't neck we mustn't neck you mustn't neck they mustn't neck	I mustn't be necking you mustn't be necking he mustn't be necking we mustn't be necking you mustn't be necking they mustn't be necking
Perfect	V-ing perfect
I mustn't have necked you mustn't have necked he mustn't have necked we mustn't have necked you mustn't have necked they mustn't have necked	I mustn't have been necking you mustn't have been necking he mustn't have been necking we mustn't have been necking you mustn't have been necking they mustn't have been necking

Interrogative form

Simple form	V-ing form
must I neck? must you neck? must he neck? must we neck? must you neck? must they neck?	must I be necking? must you be necking? must he be necking? must we be necking? must you be necking? must they be necking?
Perfect	V-ing perfect
must I have necked? must you have necked? must he have necked? must we have necked? must you have necked? must they have necked?	must I have been necking? must you have been necking? must he have been necking? must we have been necking? must you have been necking? must they have been necking?

Interro-negative form

Simple form	V-ing form
mustn't I neck? mustn't you neck? mustn't he neck? mustn't we neck? mustn't you neck? mustn't they neck?	mustn't I be necking? mustn't you be necking? mustn't he be necking? mustn't we be necking? mustn't you be necking? mustn't they be necking?
Perfect	V-ing perfect
mustn't I have necked? mustn't you have necked? mustn't he have necked? mustn't we have necked? mustn't you have necked? mustn't they have necked?	mustn't I have been necking? mustn't you have been necking? mustn't he have been necking? mustn't we have been necking? mustn't you have been necking? mustn't they have been necking?