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