I could exude you could exude she could exude we could exude you could exude they could exude
V-ing form
I could be exuding you could be exuding she could be exuding we could be exuding you could be exuding they could be exuding
Perfect
I could have exuded you could have exuded she could have exuded we could have exuded you could have exuded they could have exuded
V-ing perfect
I could have been exuding you could have been exuding she could have been exuding we could have been exuding you could have been exuding they could have been exuding
Negation
Simple form
I couldn't exude you couldn't exude she couldn't exude we couldn't exude you couldn't exude they couldn't exude
V-ing form
I couldn't be exuding you couldn't be exuding she couldn't be exuding we couldn't be exuding you couldn't be exuding they couldn't be exuding
Perfect
I couldn't have exuded you couldn't have exuded she couldn't have exuded we couldn't have exuded you couldn't have exuded they couldn't have exuded
V-ing perfect
I couldn't have been exuding you couldn't have been exuding she couldn't have been exuding we couldn't have been exuding you couldn't have been exuding they couldn't have been exuding
Interrogative form
Simple form
could I exude? could you exude? could she exude? could we exude? could you exude? could they exude?
V-ing form
could I be exuding? could you be exuding? could she be exuding? could we be exuding? could you be exuding? could they be exuding?
Perfect
could I have exuded? could you have exuded? could she have exuded? could we have exuded? could you have exuded? could they have exuded?
V-ing perfect
could I have been exuding? could you have been exuding? could she have been exuding? could we have been exuding? could you have been exuding? could they have been exuding?
Interro-negative form
Simple form
couldn't I exude? couldn't you exude? couldn't she exude? couldn't we exude? couldn't you exude? couldn't they exude?
V-ing form
couldn't I be exuding? couldn't you be exuding? couldn't she be exuding? couldn't we be exuding? couldn't you be exuding? couldn't they be exuding?
Perfect
couldn't I have exuded? couldn't you have exuded? couldn't she have exuded? couldn't we have exuded? couldn't you have exuded? couldn't they have exuded?
V-ing perfect
couldn't I have been exuding? couldn't you have been exuding? couldn't she have been exuding? couldn't we have been exuding? couldn't you have been exuding? couldn't they have been exuding?