must square
Verbo regular: square - squared- squared

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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	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	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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	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	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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? 	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? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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? 	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?