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