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