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