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 couldn't attorn you couldn't attorn he couldn't attorn we couldn't attorn you couldn't attorn they couldn't attorn
V-ing form
I couldn't be attorning you couldn't be attorning he couldn't be attorning we couldn't be attorning you couldn't be attorning they couldn't be attorning
Perfect
I couldn't have attorned you couldn't have attorned he couldn't have attorned we couldn't have attorned you couldn't have attorned they couldn't have attorned
V-ing perfect
I couldn't have been attorning you couldn't have been attorning he couldn't have been attorning we couldn't have been attorning you couldn't have been attorning they couldn't 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
couldn't I attorn? couldn't you attorn? couldn't he attorn? couldn't we attorn? couldn't you attorn? couldn't they attorn?
V-ing form
couldn't I be attorning? couldn't you be attorning? couldn't he be attorning? couldn't we be attorning? couldn't you be attorning? couldn't they be attorning?
Perfect
couldn't I have attorned? couldn't you have attorned? couldn't he have attorned? couldn't we have attorned? couldn't you have attorned? couldn't they have attorned?
V-ing perfect
couldn't I have been attorning? couldn't you have been attorning? couldn't he have been attorning? couldn't we have been attorning? couldn't you have been attorning? couldn't they have been attorning?