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