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