I can cite you can cite he can cite we can cite you can cite they can cite
V-ing form
I can be citing you can be citing he can be citing we can be citing you can be citing they can be citing
Perfect
I can have cited you can have cited he can have cited we can have cited you can have cited they can have cited
V-ing perfect
I can have been citing you can have been citing he can have been citing we can have been citing you can have been citing they can have been citing
Negation
Simple form
I can't cite you can't cite he can't cite we can't cite you can't cite they can't cite
V-ing form
I can't be citing you can't be citing he can't be citing we can't be citing you can't be citing they can't be citing
Perfect
I can't have cited you can't have cited he can't have cited we can't have cited you can't have cited they can't have cited
V-ing perfect
I can't have been citing you can't have been citing he can't have been citing we can't have been citing you can't have been citing they can't have been citing
Interrogative form
Simple form
can I cite? can you cite? can he cite? can we cite? can you cite? can they cite?
V-ing form
can I be citing? can you be citing? can he be citing? can we be citing? can you be citing? can they be citing?
Perfect
can I have cited? can you have cited? can he have cited? can we have cited? can you have cited? can they have cited?
V-ing perfect
can I have been citing? can you have been citing? can he have been citing? can we have been citing? can you have been citing? can they have been citing?
Interro-negative form
Simple form
can't I cite? can't you cite? can't he cite? can't we cite? can't you cite? can't they cite?
V-ing form
can't I be citing? can't you be citing? can't he be citing? can't we be citing? can't you be citing? can't they be citing?
Perfect
can't I have cited? can't you have cited? can't he have cited? can't we have cited? can't you have cited? can't they have cited?
V-ing perfect
can't I have been citing? can't you have been citing? can't he have been citing? can't we have been citing? can't you have been citing? can't they have been citing?