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