I could chrome you could chrome she could chrome we could chrome you could chrome they could chrome
V-ing form
I could be chroming you could be chroming she could be chroming we could be chroming you could be chroming they could be chroming
Perfect
I could have chromed you could have chromed she could have chromed we could have chromed you could have chromed they could have chromed
V-ing perfect
I could have been chroming you could have been chroming she could have been chroming we could have been chroming you could have been chroming they could have been chroming
Negation
Simple form
I could not chrome you could not chrome she could not chrome we could not chrome you could not chrome they could not chrome
V-ing form
I could not be chroming you could not be chroming she could not be chroming we could not be chroming you could not be chroming they could not be chroming
Perfect
I could not have chromed you could not have chromed she could not have chromed we could not have chromed you could not have chromed they could not have chromed
V-ing perfect
I could not have been chroming you could not have been chroming she could not have been chroming we could not have been chroming you could not have been chroming they could not have been chroming
Interrogative form
Simple form
could I chrome? could you chrome? could she chrome? could we chrome? could you chrome? could they chrome?
V-ing form
could I be chroming? could you be chroming? could she be chroming? could we be chroming? could you be chroming? could they be chroming?
Perfect
could I have chromed? could you have chromed? could she have chromed? could we have chromed? could you have chromed? could they have chromed?
V-ing perfect
could I have been chroming? could you have been chroming? could she have been chroming? could we have been chroming? could you have been chroming? could they have been chroming?
Interro-negative form
Simple form
could I not chrome? could you not chrome? could she not chrome? could we not chrome? could you not chrome? could they not chrome?
V-ing form
could I not be chroming? could you not be chroming? could she not be chroming? could we not be chroming? could you not be chroming? could they not be chroming?
Perfect
could I not have chromed? could you not have chromed? could she not have chromed? could we not have chromed? could you not have chromed? could they not have chromed?
V-ing perfect
could I not have been chroming? could you not have been chroming? could she not have been chroming? could we not have been chroming? could you not have been chroming? could they not have been chroming?