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