I could equal you could equal she could equal we could equal you could equal they could equal
V-ing form
I could be equalling you could be equalling she could be equalling we could be equalling you could be equalling they could be equalling
Perfect
I could have equalled you could have equalled she could have equalled we could have equalled you could have equalled they could have equalled
V-ing perfect
I could have been equalling you could have been equalling she could have been equalling we could have been equalling you could have been equalling they could have been equalling
Negation
Simple form
I couldn't equal you couldn't equal she couldn't equal we couldn't equal you couldn't equal they couldn't equal
V-ing form
I couldn't be equalling you couldn't be equalling she couldn't be equalling we couldn't be equalling you couldn't be equalling they couldn't be equalling
Perfect
I couldn't have equalled you couldn't have equalled she couldn't have equalled we couldn't have equalled you couldn't have equalled they couldn't have equalled
V-ing perfect
I couldn't have been equalling you couldn't have been equalling she couldn't have been equalling we couldn't have been equalling you couldn't have been equalling they couldn't have been equalling
Interrogative form
Simple form
could I equal? could you equal? could she equal? could we equal? could you equal? could they equal?
V-ing form
could I be equalling? could you be equalling? could she be equalling? could we be equalling? could you be equalling? could they be equalling?
Perfect
could I have equalled? could you have equalled? could she have equalled? could we have equalled? could you have equalled? could they have equalled?
V-ing perfect
could I have been equalling? could you have been equalling? could she have been equalling? could we have been equalling? could you have been equalling? could they have been equalling?
Interro-negative form
Simple form
couldn't I equal? couldn't you equal? couldn't she equal? couldn't we equal? couldn't you equal? couldn't they equal?
V-ing form
couldn't I be equalling? couldn't you be equalling? couldn't she be equalling? couldn't we be equalling? couldn't you be equalling? couldn't they be equalling?
Perfect
couldn't I have equalled? couldn't you have equalled? couldn't she have equalled? couldn't we have equalled? couldn't you have equalled? couldn't they have equalled?
V-ing perfect
couldn't I have been equalling? couldn't you have been equalling? couldn't she have been equalling? couldn't we have been equalling? couldn't you have been equalling? couldn't they have been equalling?