I could attorn you could attorn he could attorn we could attorn you could attorn they could attorn
V-ing form
I could be attorning you could be attorning he could be attorning we could be attorning you could be attorning they could be attorning
Perfect
I could have attorned you could have attorned he could have attorned we could have attorned you could have attorned they could have attorned
V-ing perfect
I could have been attorning you could have been attorning he could have been attorning we could have been attorning you could have been attorning they could have been attorning
Negation
Simple form
I could not attorn you could not attorn he could not attorn we could not attorn you could not attorn they could not attorn
V-ing form
I could not be attorning you could not be attorning he could not be attorning we could not be attorning you could not be attorning they could not be attorning
Perfect
I could not have attorned you could not have attorned he could not have attorned we could not have attorned you could not have attorned they could not have attorned
V-ing perfect
I could not have been attorning you could not have been attorning he could not have been attorning we could not have been attorning you could not have been attorning they could not have been attorning
Interrogative form
Simple form
could I attorn? could you attorn? could he attorn? could we attorn? could you attorn? could they attorn?
V-ing form
could I be attorning? could you be attorning? could he be attorning? could we be attorning? could you be attorning? could they be attorning?
Perfect
could I have attorned? could you have attorned? could he have attorned? could we have attorned? could you have attorned? could they have attorned?
V-ing perfect
could I have been attorning? could you have been attorning? could he have been attorning? could we have been attorning? could you have been attorning? could they have been attorning?
Interro-negative form
Simple form
could I not attorn? could you not attorn? could he not attorn? could we not attorn? could you not attorn? could they not attorn?
V-ing form
could I not be attorning? could you not be attorning? could he not be attorning? could we not be attorning? could you not be attorning? could they not be attorning?
Perfect
could I not have attorned? could you not have attorned? could he not have attorned? could we not have attorned? could you not have attorned? could they not have attorned?
V-ing perfect
could I not have been attorning? could you not have been attorning? could he not have been attorning? could we not have been attorning? could you not have been attorning? could they not have been attorning?