English verb conjugation
MUST KEYPUNCH

Regular verb: keypunch - keypunched - keypunched

Affirmation

Simple form	V-ing form
I must keypunch you must keypunch she must keypunch we must keypunch you must keypunch they must keypunch	I must be keypunching you must be keypunching she must be keypunching we must be keypunching you must be keypunching they must be keypunching
Perfect	V-ing perfect
I must have keypunched you must have keypunched she must have keypunched we must have keypunched you must have keypunched they must have keypunched	I must have been keypunching you must have been keypunching she must have been keypunching we must have been keypunching you must have been keypunching they must have been keypunching

Negation

Simple form	V-ing form
I mustn't keypunch you mustn't keypunch she mustn't keypunch we mustn't keypunch you mustn't keypunch they mustn't keypunch	I mustn't be keypunching you mustn't be keypunching she mustn't be keypunching we mustn't be keypunching you mustn't be keypunching they mustn't be keypunching
Perfect	V-ing perfect
I mustn't have keypunched you mustn't have keypunched she mustn't have keypunched we mustn't have keypunched you mustn't have keypunched they mustn't have keypunched	I mustn't have been keypunching you mustn't have been keypunching she mustn't have been keypunching we mustn't have been keypunching you mustn't have been keypunching they mustn't have been keypunching

Interrogative form

Simple form	V-ing form
must I keypunch? must you keypunch? must she keypunch? must we keypunch? must you keypunch? must they keypunch?	must I be keypunching? must you be keypunching? must she be keypunching? must we be keypunching? must you be keypunching? must they be keypunching?
Perfect	V-ing perfect
must I have keypunched? must you have keypunched? must she have keypunched? must we have keypunched? must you have keypunched? must they have keypunched?	must I have been keypunching? must you have been keypunching? must she have been keypunching? must we have been keypunching? must you have been keypunching? must they have been keypunching?

Interro-negative form

Simple form	V-ing form
mustn't I keypunch? mustn't you keypunch? mustn't she keypunch? mustn't we keypunch? mustn't you keypunch? mustn't they keypunch?	mustn't I be keypunching? mustn't you be keypunching? mustn't she be keypunching? mustn't we be keypunching? mustn't you be keypunching? mustn't they be keypunching?
Perfect	V-ing perfect
mustn't I have keypunched? mustn't you have keypunched? mustn't she have keypunched? mustn't we have keypunched? mustn't you have keypunched? mustn't they have keypunched?	mustn't I have been keypunching? mustn't you have been keypunching? mustn't she have been keypunching? mustn't we have been keypunching? mustn't you have been keypunching? mustn't they have been keypunching?