English verb conjugation
MUST CAT

Regular verb: cat - cated - cated

Affirmation

Simple form	V-ing form
I must cat you must cat he must cat we must cat you must cat they must cat	I must be cating you must be cating he must be cating we must be cating you must be cating they must be cating
Perfect	V-ing perfect
I must have cated you must have cated he must have cated we must have cated you must have cated they must have cated	I must have been cating you must have been cating he must have been cating we must have been cating you must have been cating they must have been cating

Negation

Simple form	V-ing form
I mustn't cat you mustn't cat he mustn't cat we mustn't cat you mustn't cat they mustn't cat	I mustn't be cating you mustn't be cating he mustn't be cating we mustn't be cating you mustn't be cating they mustn't be cating
Perfect	V-ing perfect
I mustn't have cated you mustn't have cated he mustn't have cated we mustn't have cated you mustn't have cated they mustn't have cated	I mustn't have been cating you mustn't have been cating he mustn't have been cating we mustn't have been cating you mustn't have been cating they mustn't have been cating

Interrogative form

Simple form	V-ing form
must I cat? must you cat? must he cat? must we cat? must you cat? must they cat?	must I be cating? must you be cating? must he be cating? must we be cating? must you be cating? must they be cating?
Perfect	V-ing perfect
must I have cated? must you have cated? must he have cated? must we have cated? must you have cated? must they have cated?	must I have been cating? must you have been cating? must he have been cating? must we have been cating? must you have been cating? must they have been cating?

Interro-negative form

Simple form	V-ing form
mustn't I cat? mustn't you cat? mustn't he cat? mustn't we cat? mustn't you cat? mustn't they cat?	mustn't I be cating? mustn't you be cating? mustn't he be cating? mustn't we be cating? mustn't you be cating? mustn't they be cating?
Perfect	V-ing perfect
mustn't I have cated? mustn't you have cated? mustn't he have cated? mustn't we have cated? mustn't you have cated? mustn't they have cated?	mustn't I have been cating? mustn't you have been cating? mustn't he have been cating? mustn't we have been cating? mustn't you have been cating? mustn't they have been cating?