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