I could offîceii you could offîceii she could offîceii we could offîceii you could offîceii they could offîceii
V-ing form
I could be offîceiiing you could be offîceiiing she could be offîceiiing we could be offîceiiing you could be offîceiiing they could be offîceiiing
Perfect
I could have offîceiied you could have offîceiied she could have offîceiied we could have offîceiied you could have offîceiied they could have offîceiied
V-ing perfect
I could have been offîceiiing you could have been offîceiiing she could have been offîceiiing we could have been offîceiiing you could have been offîceiiing they could have been offîceiiing
Negation
Simple form
I could not offîceii you could not offîceii she could not offîceii we could not offîceii you could not offîceii they could not offîceii
V-ing form
I could not be offîceiiing you could not be offîceiiing she could not be offîceiiing we could not be offîceiiing you could not be offîceiiing they could not be offîceiiing
Perfect
I could not have offîceiied you could not have offîceiied she could not have offîceiied we could not have offîceiied you could not have offîceiied they could not have offîceiied
V-ing perfect
I could not have been offîceiiing you could not have been offîceiiing she could not have been offîceiiing we could not have been offîceiiing you could not have been offîceiiing they could not have been offîceiiing
Interrogative form
Simple form
could I offîceii? could you offîceii? could she offîceii? could we offîceii? could you offîceii? could they offîceii?
V-ing form
could I be offîceiiing? could you be offîceiiing? could she be offîceiiing? could we be offîceiiing? could you be offîceiiing? could they be offîceiiing?
Perfect
could I have offîceiied? could you have offîceiied? could she have offîceiied? could we have offîceiied? could you have offîceiied? could they have offîceiied?
V-ing perfect
could I have been offîceiiing? could you have been offîceiiing? could she have been offîceiiing? could we have been offîceiiing? could you have been offîceiiing? could they have been offîceiiing?
Interro-negative form
Simple form
could I not offîceii? could you not offîceii? could she not offîceii? could we not offîceii? could you not offîceii? could they not offîceii?
V-ing form
could I not be offîceiiing? could you not be offîceiiing? could she not be offîceiiing? could we not be offîceiiing? could you not be offîceiiing? could they not be offîceiiing?
Perfect
could I not have offîceiied? could you not have offîceiied? could she not have offîceiied? could we not have offîceiied? could you not have offîceiied? could they not have offîceiied?
V-ing perfect
could I not have been offîceiiing? could you not have been offîceiiing? could she not have been offîceiiing? could we not have been offîceiiing? could you not have been offîceiiing? could they not have been offîceiiing?