I could metamorphose you could metamorphose she could metamorphose we could metamorphose you could metamorphose they could metamorphose
V-ing form
I could be metamorphosing you could be metamorphosing she could be metamorphosing we could be metamorphosing you could be metamorphosing they could be metamorphosing
Perfect
I could have metamorphosed you could have metamorphosed she could have metamorphosed we could have metamorphosed you could have metamorphosed they could have metamorphosed
V-ing perfect
I could have been metamorphosing you could have been metamorphosing she could have been metamorphosing we could have been metamorphosing you could have been metamorphosing they could have been metamorphosing
Negation
Simple form
I couldn't metamorphose you couldn't metamorphose she couldn't metamorphose we couldn't metamorphose you couldn't metamorphose they couldn't metamorphose
V-ing form
I couldn't be metamorphosing you couldn't be metamorphosing she couldn't be metamorphosing we couldn't be metamorphosing you couldn't be metamorphosing they couldn't be metamorphosing
Perfect
I couldn't have metamorphosed you couldn't have metamorphosed she couldn't have metamorphosed we couldn't have metamorphosed you couldn't have metamorphosed they couldn't have metamorphosed
V-ing perfect
I couldn't have been metamorphosing you couldn't have been metamorphosing she couldn't have been metamorphosing we couldn't have been metamorphosing you couldn't have been metamorphosing they couldn't have been metamorphosing
Interrogative form
Simple form
could I metamorphose? could you metamorphose? could she metamorphose? could we metamorphose? could you metamorphose? could they metamorphose?
V-ing form
could I be metamorphosing? could you be metamorphosing? could she be metamorphosing? could we be metamorphosing? could you be metamorphosing? could they be metamorphosing?
Perfect
could I have metamorphosed? could you have metamorphosed? could she have metamorphosed? could we have metamorphosed? could you have metamorphosed? could they have metamorphosed?
V-ing perfect
could I have been metamorphosing? could you have been metamorphosing? could she have been metamorphosing? could we have been metamorphosing? could you have been metamorphosing? could they have been metamorphosing?
Interro-negative form
Simple form
couldn't I metamorphose? couldn't you metamorphose? couldn't she metamorphose? couldn't we metamorphose? couldn't you metamorphose? couldn't they metamorphose?
V-ing form
couldn't I be metamorphosing? couldn't you be metamorphosing? couldn't she be metamorphosing? couldn't we be metamorphosing? couldn't you be metamorphosing? couldn't they be metamorphosing?
Perfect
couldn't I have metamorphosed? couldn't you have metamorphosed? couldn't she have metamorphosed? couldn't we have metamorphosed? couldn't you have metamorphosed? couldn't they have metamorphosed?
V-ing perfect
couldn't I have been metamorphosing? couldn't you have been metamorphosing? couldn't she have been metamorphosing? couldn't we have been metamorphosing? couldn't you have been metamorphosing? couldn't they have been metamorphosing?