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