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