I could shoe you could shoe she could shoe we could shoe you could shoe they could shoe
V-ing form
I could be shoing you could be shoing she could be shoing we could be shoing you could be shoing they could be shoing
Perfect
I could have shod, shoed you could have shod, shoed she could have shod, shoed we could have shod, shoed you could have shod, shoed they could have shod, shoed
V-ing perfect
I could have been shoing you could have been shoing she could have been shoing we could have been shoing you could have been shoing they could have been shoing
Negation
Simple form
I couldn't shoe you couldn't shoe she couldn't shoe we couldn't shoe you couldn't shoe they couldn't shoe
V-ing form
I couldn't be shoing you couldn't be shoing she couldn't be shoing we couldn't be shoing you couldn't be shoing they couldn't be shoing
Perfect
I couldn't have shod, shoed you couldn't have shod, shoed she couldn't have shod, shoed we couldn't have shod, shoed you couldn't have shod, shoed they couldn't have shod, shoed
V-ing perfect
I couldn't have been shoing you couldn't have been shoing she couldn't have been shoing we couldn't have been shoing you couldn't have been shoing they couldn't have been shoing
Interrogative form
Simple form
could I shoe? could you shoe? could she shoe? could we shoe? could you shoe? could they shoe?
V-ing form
could I be shoing? could you be shoing? could she be shoing? could we be shoing? could you be shoing? could they be shoing?
Perfect
could I have shod, shoed? could you have shod, shoed? could she have shod, shoed? could we have shod, shoed? could you have shod, shoed? could they have shod, shoed?
V-ing perfect
could I have been shoing? could you have been shoing? could she have been shoing? could we have been shoing? could you have been shoing? could they have been shoing?
Interro-negative form
Simple form
couldn't I shoe? couldn't you shoe? couldn't she shoe? couldn't we shoe? couldn't you shoe? couldn't they shoe?
V-ing form
couldn't I be shoing? couldn't you be shoing? couldn't she be shoing? couldn't we be shoing? couldn't you be shoing? couldn't they be shoing?
Perfect
couldn't I have shod, shoed? couldn't you have shod, shoed? couldn't she have shod, shoed? couldn't we have shod, shoed? couldn't you have shod, shoed? couldn't they have shod, shoed?
V-ing perfect
couldn't I have been shoing? couldn't you have been shoing? couldn't she have been shoing? couldn't we have been shoing? couldn't you have been shoing? couldn't they have been shoing?