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