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