English verb conjugation
SHOULD SPARE

Regular verb: spare - spared - spared

Affirmation

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