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