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