must spare
Verbo regular: spare - spared- spared

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must spare
you must spare
he must spare
we must spare
you must spare
they must spare 	I must be sparing
you must be sparing
he must be sparing
we must be sparing
you must be sparing
they must be sparing	I must have spared
you must have spared
he must have spared
we must have spared
you must have spared
they must have spared	I must have been sparing
you must have been sparing
he must have been sparing
we must have been sparing
you must have been sparing
they must have been sparing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not spare
you must not spare
he must not spare
we must not spare
you must not spare
they must not spare 	I must not be sparing
you must not be sparing
he must not be sparing
we must not be sparing
you must not be sparing
they must not be sparing	I must not have spared
you must not have spared
he must not have spared
we must not have spared
you must not have spared
they must not have spared	I must not have been sparing
you must not have been sparing
he must not have been sparing
we must not have been sparing
you must not have been sparing
they must not have been sparing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I spare?
must you spare?
must he spare?
must we spare?
must you spare?
must they spare? 	must I be sparing?
must you be sparing?
must he be sparing?
must we be sparing?
must you be sparing?
must they be sparing? 	must I have spared?
must you have spared?
must he have spared?
must we have spared?
must you have spared?
must they have spared? 	must I have been sparing?
must you have been sparing?
must he have been sparing?
must we have been sparing?
must you have been sparing?
must they have been sparing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not spare?
must you not spare?
must he not spare?
must we not spare?
must you not spare?
must they not spare? 	must I not be sparing?
must you not be sparing?
must he not be sparing?
must we not be sparing?
must you not be sparing?
must they not be sparing? 	must I not have spared?
must you not have spared?
must he not have spared?
must we not have spared?
must you not have spared?
must they not have spared? 	must I not have been sparing?
must you not have been sparing?
must he not have been sparing?
must we not have been sparing?
must you not have been sparing?
must they not have been sparing?