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