English verb conjugation
MUST UNDERCOOK

Regular verb: undercook - undercooked - undercooked

Affirmation

Simple form	V-ing form
I must undercook you must undercook he must undercook we must undercook you must undercook they must undercook	I must be undercooking you must be undercooking he must be undercooking we must be undercooking you must be undercooking they must be undercooking
Perfect	V-ing perfect
I must have undercooked you must have undercooked he must have undercooked we must have undercooked you must have undercooked they must have undercooked	I must have been undercooking you must have been undercooking he must have been undercooking we must have been undercooking you must have been undercooking they must have been undercooking

Negation

Simple form	V-ing form
I mustn't undercook you mustn't undercook he mustn't undercook we mustn't undercook you mustn't undercook they mustn't undercook	I mustn't be undercooking you mustn't be undercooking he mustn't be undercooking we mustn't be undercooking you mustn't be undercooking they mustn't be undercooking
Perfect	V-ing perfect
I mustn't have undercooked you mustn't have undercooked he mustn't have undercooked we mustn't have undercooked you mustn't have undercooked they mustn't have undercooked	I mustn't have been undercooking you mustn't have been undercooking he mustn't have been undercooking we mustn't have been undercooking you mustn't have been undercooking they mustn't have been undercooking

Interrogative form

Simple form	V-ing form
must I undercook? must you undercook? must he undercook? must we undercook? must you undercook? must they undercook?	must I be undercooking? must you be undercooking? must he be undercooking? must we be undercooking? must you be undercooking? must they be undercooking?
Perfect	V-ing perfect
must I have undercooked? must you have undercooked? must he have undercooked? must we have undercooked? must you have undercooked? must they have undercooked?	must I have been undercooking? must you have been undercooking? must he have been undercooking? must we have been undercooking? must you have been undercooking? must they have been undercooking?

Interro-negative form

Simple form	V-ing form
mustn't I undercook? mustn't you undercook? mustn't he undercook? mustn't we undercook? mustn't you undercook? mustn't they undercook?	mustn't I be undercooking? mustn't you be undercooking? mustn't he be undercooking? mustn't we be undercooking? mustn't you be undercooking? mustn't they be undercooking?
Perfect	V-ing perfect
mustn't I have undercooked? mustn't you have undercooked? mustn't he have undercooked? mustn't we have undercooked? mustn't you have undercooked? mustn't they have undercooked?	mustn't I have been undercooking? mustn't you have been undercooking? mustn't he have been undercooking? mustn't we have been undercooking? mustn't you have been undercooking? mustn't they have been undercooking?