English verb conjugation
MUST SQUARE

Regular verb: square - squared - squared

Affirmation

Simple form	V-ing form
I must square you must square he must square we must square you must square they must square	I must be squaring you must be squaring he must be squaring we must be squaring you must be squaring they must be squaring
Perfect	V-ing perfect
I must have squared you must have squared he must have squared we must have squared you must have squared they must have squared	I must have been squaring you must have been squaring he must have been squaring we must have been squaring you must have been squaring they must have been squaring

Negation

Simple form	V-ing form
I mustn't square you mustn't square he mustn't square we mustn't square you mustn't square they mustn't square	I mustn't be squaring you mustn't be squaring he mustn't be squaring we mustn't be squaring you mustn't be squaring they mustn't be squaring
Perfect	V-ing perfect
I mustn't have squared you mustn't have squared he mustn't have squared we mustn't have squared you mustn't have squared they mustn't have squared	I mustn't have been squaring you mustn't have been squaring he mustn't have been squaring we mustn't have been squaring you mustn't have been squaring they mustn't have been squaring

Interrogative form

Simple form	V-ing form
must I square? must you square? must he square? must we square? must you square? must they square?	must I be squaring? must you be squaring? must he be squaring? must we be squaring? must you be squaring? must they be squaring?
Perfect	V-ing perfect
must I have squared? must you have squared? must he have squared? must we have squared? must you have squared? must they have squared?	must I have been squaring? must you have been squaring? must he have been squaring? must we have been squaring? must you have been squaring? must they have been squaring?

Interro-negative form

Simple form	V-ing form
mustn't I square? mustn't you square? mustn't he square? mustn't we square? mustn't you square? mustn't they square?	mustn't I be squaring? mustn't you be squaring? mustn't he be squaring? mustn't we be squaring? mustn't you be squaring? mustn't they be squaring?
Perfect	V-ing perfect
mustn't I have squared? mustn't you have squared? mustn't he have squared? mustn't we have squared? mustn't you have squared? mustn't they have squared?	mustn't I have been squaring? mustn't you have been squaring? mustn't he have been squaring? mustn't we have been squaring? mustn't you have been squaring? mustn't they have been squaring?