should spare
Regular verb: spare - spared- spared

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd spare
you'd spare
he'd spare
we'd spare
you'd spare
they'd spare 	I'd be sparing
you'd be sparing
he'd be sparing
we'd be sparing
you'd be sparing
they'd be sparing	I should've spared
you should've spared
he should've spared
we should've spared
you should've spared
they should've spared	I should've been sparing
you should've been sparing
he should've been sparing
we should've been sparing
you should've been sparing
they should've been sparing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't spare
you shouldn't spare
he shouldn't spare
we shouldn't spare
you shouldn't spare
they shouldn't spare 	I shouldn't be sparing
you shouldn't be sparing
he shouldn't be sparing
we shouldn't be sparing
you shouldn't be sparing
they shouldn't be sparing	I shouldn't have spared
you shouldn't have spared
he shouldn't have spared
we shouldn't have spared
you shouldn't have spared
they shouldn't have spared	I shouldn't have been sparing
you shouldn't have been sparing
he shouldn't have been sparing
we shouldn't have been sparing
you shouldn't have been sparing
they shouldn't have been sparing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I spare?
should you spare?
should he spare?
should we spare?
should you spare?
should they spare? 	should I be sparing?
should you be sparing?
should he be sparing?
should we be sparing?
should you be sparing?
should they be sparing? 	should I have spared?
should you have spared?
should he have spared?
should we have spared?
should you have spared?
should they have spared? 	should I have been sparing?
should you have been sparing?
should he have been sparing?
should we have been sparing?
should you have been sparing?
should they have been sparing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I spare?
shouldn't you spare?
shouldn't he spare?
shouldn't we spare?
shouldn't you spare?
shouldn't they spare? 	shouldn't I be sparing?
shouldn't you be sparing?
shouldn't he be sparing?
shouldn't we be sparing?
shouldn't you be sparing?
shouldn't they be sparing? 	shouldn't I have spared?
shouldn't you have spared?
shouldn't he have spared?
shouldn't we have spared?
shouldn't you have spared?
shouldn't they have spared? 	shouldn't I have been sparing?
shouldn't you have been sparing?
shouldn't he have been sparing?
shouldn't we have been sparing?
shouldn't you have been sparing?
shouldn't they have been sparing?