I could cross-section you could cross-section he could cross-section we could cross-section you could cross-section they could cross-section
V-ing form
I could be cross-sectioning you could be cross-sectioning he could be cross-sectioning we could be cross-sectioning you could be cross-sectioning they could be cross-sectioning
Perfect
I could have cross-sectioned you could have cross-sectioned he could have cross-sectioned we could have cross-sectioned you could have cross-sectioned they could have cross-sectioned
V-ing perfect
I could have been cross-sectioning you could have been cross-sectioning he could have been cross-sectioning we could have been cross-sectioning you could have been cross-sectioning they could have been cross-sectioning
Negation
Simple form
I couldn't cross-section you couldn't cross-section he couldn't cross-section we couldn't cross-section you couldn't cross-section they couldn't cross-section
V-ing form
I couldn't be cross-sectioning you couldn't be cross-sectioning he couldn't be cross-sectioning we couldn't be cross-sectioning you couldn't be cross-sectioning they couldn't be cross-sectioning
Perfect
I couldn't have cross-sectioned you couldn't have cross-sectioned he couldn't have cross-sectioned we couldn't have cross-sectioned you couldn't have cross-sectioned they couldn't have cross-sectioned
V-ing perfect
I couldn't have been cross-sectioning you couldn't have been cross-sectioning he couldn't have been cross-sectioning we couldn't have been cross-sectioning you couldn't have been cross-sectioning they couldn't have been cross-sectioning
Interrogative form
Simple form
could I cross-section? could you cross-section? could he cross-section? could we cross-section? could you cross-section? could they cross-section?
V-ing form
could I be cross-sectioning? could you be cross-sectioning? could he be cross-sectioning? could we be cross-sectioning? could you be cross-sectioning? could they be cross-sectioning?
Perfect
could I have cross-sectioned? could you have cross-sectioned? could he have cross-sectioned? could we have cross-sectioned? could you have cross-sectioned? could they have cross-sectioned?
V-ing perfect
could I have been cross-sectioning? could you have been cross-sectioning? could he have been cross-sectioning? could we have been cross-sectioning? could you have been cross-sectioning? could they have been cross-sectioning?
Interro-negative form
Simple form
couldn't I cross-section? couldn't you cross-section? couldn't he cross-section? couldn't we cross-section? couldn't you cross-section? couldn't they cross-section?
V-ing form
couldn't I be cross-sectioning? couldn't you be cross-sectioning? couldn't he be cross-sectioning? couldn't we be cross-sectioning? couldn't you be cross-sectioning? couldn't they be cross-sectioning?
Perfect
couldn't I have cross-sectioned? couldn't you have cross-sectioned? couldn't he have cross-sectioned? couldn't we have cross-sectioned? couldn't you have cross-sectioned? couldn't they have cross-sectioned?
V-ing perfect
couldn't I have been cross-sectioning? couldn't you have been cross-sectioning? couldn't he have been cross-sectioning? couldn't we have been cross-sectioning? couldn't you have been cross-sectioning? couldn't they have been cross-sectioning?