I could segment you could segment he could segment we could segment you could segment they could segment
V-ing form
I could be segmenting you could be segmenting he could be segmenting we could be segmenting you could be segmenting they could be segmenting
Perfect
I could have segmented you could have segmented he could have segmented we could have segmented you could have segmented they could have segmented
V-ing perfect
I could have been segmenting you could have been segmenting he could have been segmenting we could have been segmenting you could have been segmenting they could have been segmenting
Negation
Simple form
I couldn't segment you couldn't segment he couldn't segment we couldn't segment you couldn't segment they couldn't segment
V-ing form
I couldn't be segmenting you couldn't be segmenting he couldn't be segmenting we couldn't be segmenting you couldn't be segmenting they couldn't be segmenting
Perfect
I couldn't have segmented you couldn't have segmented he couldn't have segmented we couldn't have segmented you couldn't have segmented they couldn't have segmented
V-ing perfect
I couldn't have been segmenting you couldn't have been segmenting he couldn't have been segmenting we couldn't have been segmenting you couldn't have been segmenting they couldn't have been segmenting
Interrogative form
Simple form
could I segment? could you segment? could he segment? could we segment? could you segment? could they segment?
V-ing form
could I be segmenting? could you be segmenting? could he be segmenting? could we be segmenting? could you be segmenting? could they be segmenting?
Perfect
could I have segmented? could you have segmented? could he have segmented? could we have segmented? could you have segmented? could they have segmented?
V-ing perfect
could I have been segmenting? could you have been segmenting? could he have been segmenting? could we have been segmenting? could you have been segmenting? could they have been segmenting?
Interro-negative form
Simple form
couldn't I segment? couldn't you segment? couldn't he segment? couldn't we segment? couldn't you segment? couldn't they segment?
V-ing form
couldn't I be segmenting? couldn't you be segmenting? couldn't he be segmenting? couldn't we be segmenting? couldn't you be segmenting? couldn't they be segmenting?
Perfect
couldn't I have segmented? couldn't you have segmented? couldn't he have segmented? couldn't we have segmented? couldn't you have segmented? couldn't they have segmented?
V-ing perfect
couldn't I have been segmenting? couldn't you have been segmenting? couldn't he have been segmenting? couldn't we have been segmenting? couldn't you have been segmenting? couldn't they have been segmenting?