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