must square
Regular verb: square - squared- squared

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not square
you must not square
he must not square
we must not square
you must not square
they must not square 	I must not be squaring
you must not be squaring
he must not be squaring
we must not be squaring
you must not be squaring
they must not be squaring	I must not have squared
you must not have squared
he must not have squared
we must not have squared
you must not have squared
they must not have squared	I must not have been squaring
you must not have been squaring
he must not have been squaring
we must not have been squaring
you must not have been squaring
they must not have been squaring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not square?
must you not square?
must he not square?
must we not square?
must you not square?
must they not square? 	must I not be squaring?
must you not be squaring?
must he not be squaring?
must we not be squaring?
must you not be squaring?
must they not be squaring? 	must I not have squared?
must you not have squared?
must he not have squared?
must we not have squared?
must you not have squared?
must they not have squared? 	must I not have been squaring?
must you not have been squaring?
must he not have been squaring?
must we not have been squaring?
must you not have been squaring?
must they not have been squaring?