I could machine-gun you could machine-gun he could machine-gun we could machine-gun you could machine-gun they could machine-gun
V-ing form
I could be machine-guning you could be machine-guning he could be machine-guning we could be machine-guning you could be machine-guning they could be machine-guning
Perfect
I could have machine-guned you could have machine-guned he could have machine-guned we could have machine-guned you could have machine-guned they could have machine-guned
V-ing perfect
I could have been machine-guning you could have been machine-guning he could have been machine-guning we could have been machine-guning you could have been machine-guning they could have been machine-guning
Negation
Simple form
I could not machine-gun you could not machine-gun he could not machine-gun we could not machine-gun you could not machine-gun they could not machine-gun
V-ing form
I could not be machine-guning you could not be machine-guning he could not be machine-guning we could not be machine-guning you could not be machine-guning they could not be machine-guning
Perfect
I could not have machine-guned you could not have machine-guned he could not have machine-guned we could not have machine-guned you could not have machine-guned they could not have machine-guned
V-ing perfect
I could not have been machine-guning you could not have been machine-guning he could not have been machine-guning we could not have been machine-guning you could not have been machine-guning they could not have been machine-guning
Interrogative form
Simple form
could I machine-gun? could you machine-gun? could he machine-gun? could we machine-gun? could you machine-gun? could they machine-gun?
V-ing form
could I be machine-guning? could you be machine-guning? could he be machine-guning? could we be machine-guning? could you be machine-guning? could they be machine-guning?
Perfect
could I have machine-guned? could you have machine-guned? could he have machine-guned? could we have machine-guned? could you have machine-guned? could they have machine-guned?
V-ing perfect
could I have been machine-guning? could you have been machine-guning? could he have been machine-guning? could we have been machine-guning? could you have been machine-guning? could they have been machine-guning?
Interro-negative form
Simple form
could I not machine-gun? could you not machine-gun? could he not machine-gun? could we not machine-gun? could you not machine-gun? could they not machine-gun?
V-ing form
could I not be machine-guning? could you not be machine-guning? could he not be machine-guning? could we not be machine-guning? could you not be machine-guning? could they not be machine-guning?
Perfect
could I not have machine-guned? could you not have machine-guned? could he not have machine-guned? could we not have machine-guned? could you not have machine-guned? could they not have machine-guned?
V-ing perfect
could I not have been machine-guning? could you not have been machine-guning? could he not have been machine-guning? could we not have been machine-guning? could you not have been machine-guning? could they not have been machine-guning?