I can appoint you can appoint he can appoint we can appoint you can appoint they can appoint
V-ing form
I can be appointing you can be appointing he can be appointing we can be appointing you can be appointing they can be appointing
Perfect
I can have appointed you can have appointed he 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 he 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 he 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 he 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 he 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 he 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 he appoint? can we appoint? can you appoint? can they appoint?
V-ing form
can I be appointing? can you be appointing? can he be appointing? can we be appointing? can you be appointing? can they be appointing?
Perfect
can I have appointed? can you have appointed? can he 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 he 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 he 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 he 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 he 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 he have been appointing? can't we have been appointing? can't you have been appointing? can't they have been appointing?