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