I could culminate you could culminate she could culminate we could culminate you could culminate they could culminate
V-ing form
I could be culminating you could be culminating she could be culminating we could be culminating you could be culminating they could be culminating
Perfect
I could have culminated you could have culminated she could have culminated we could have culminated you could have culminated they could have culminated
V-ing perfect
I could have been culminating you could have been culminating she could have been culminating we could have been culminating you could have been culminating they could have been culminating
Negation
Simple form
I could not culminate you could not culminate she could not culminate we could not culminate you could not culminate they could not culminate
V-ing form
I could not be culminating you could not be culminating she could not be culminating we could not be culminating you could not be culminating they could not be culminating
Perfect
I could not have culminated you could not have culminated she could not have culminated we could not have culminated you could not have culminated they could not have culminated
V-ing perfect
I could not have been culminating you could not have been culminating she could not have been culminating we could not have been culminating you could not have been culminating they could not have been culminating
Interrogative form
Simple form
could I culminate? could you culminate? could she culminate? could we culminate? could you culminate? could they culminate?
V-ing form
could I be culminating? could you be culminating? could she be culminating? could we be culminating? could you be culminating? could they be culminating?
Perfect
could I have culminated? could you have culminated? could she have culminated? could we have culminated? could you have culminated? could they have culminated?
V-ing perfect
could I have been culminating? could you have been culminating? could she have been culminating? could we have been culminating? could you have been culminating? could they have been culminating?
Interro-negative form
Simple form
could I not culminate? could you not culminate? could she not culminate? could we not culminate? could you not culminate? could they not culminate?
V-ing form
could I not be culminating? could you not be culminating? could she not be culminating? could we not be culminating? could you not be culminating? could they not be culminating?
Perfect
could I not have culminated? could you not have culminated? could she not have culminated? could we not have culminated? could you not have culminated? could they not have culminated?
V-ing perfect
could I not have been culminating? could you not have been culminating? could she not have been culminating? could we not have been culminating? could you not have been culminating? could they not have been culminating?