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