I could guillotine you could guillotine she could guillotine we could guillotine you could guillotine they could guillotine
V-ing form
I could be guillotining you could be guillotining she could be guillotining we could be guillotining you could be guillotining they could be guillotining
Perfect
I could have guillotined you could have guillotined she could have guillotined we could have guillotined you could have guillotined they could have guillotined
V-ing perfect
I could have been guillotining you could have been guillotining she could have been guillotining we could have been guillotining you could have been guillotining they could have been guillotining
Negation
Simple form
I could not guillotine you could not guillotine she could not guillotine we could not guillotine you could not guillotine they could not guillotine
V-ing form
I could not be guillotining you could not be guillotining she could not be guillotining we could not be guillotining you could not be guillotining they could not be guillotining
Perfect
I could not have guillotined you could not have guillotined she could not have guillotined we could not have guillotined you could not have guillotined they could not have guillotined
V-ing perfect
I could not have been guillotining you could not have been guillotining she could not have been guillotining we could not have been guillotining you could not have been guillotining they could not have been guillotining
Interrogative form
Simple form
could I guillotine? could you guillotine? could she guillotine? could we guillotine? could you guillotine? could they guillotine?
V-ing form
could I be guillotining? could you be guillotining? could she be guillotining? could we be guillotining? could you be guillotining? could they be guillotining?
Perfect
could I have guillotined? could you have guillotined? could she have guillotined? could we have guillotined? could you have guillotined? could they have guillotined?
V-ing perfect
could I have been guillotining? could you have been guillotining? could she have been guillotining? could we have been guillotining? could you have been guillotining? could they have been guillotining?
Interro-negative form
Simple form
could I not guillotine? could you not guillotine? could she not guillotine? could we not guillotine? could you not guillotine? could they not guillotine?
V-ing form
could I not be guillotining? could you not be guillotining? could she not be guillotining? could we not be guillotining? could you not be guillotining? could they not be guillotining?
Perfect
could I not have guillotined? could you not have guillotined? could she not have guillotined? could we not have guillotined? could you not have guillotined? could they not have guillotined?
V-ing perfect
could I not have been guillotining? could you not have been guillotining? could she not have been guillotining? could we not have been guillotining? could you not have been guillotining? could they not have been guillotining?