I can occupy you can occupy he can occupy we can occupy you can occupy they can occupy
V-ing form
I can be occupying you can be occupying he can be occupying we can be occupying you can be occupying they can be occupying
Perfect
I can have occupied you can have occupied he can have occupied we can have occupied you can have occupied they can have occupied
V-ing perfect
I can have been occupying you can have been occupying he can have been occupying we can have been occupying you can have been occupying they can have been occupying
Negation
Simple form
I can't occupy you can't occupy he can't occupy we can't occupy you can't occupy they can't occupy
V-ing form
I can't be occupying you can't be occupying he can't be occupying we can't be occupying you can't be occupying they can't be occupying
Perfect
I can't have occupied you can't have occupied he can't have occupied we can't have occupied you can't have occupied they can't have occupied
V-ing perfect
I can't have been occupying you can't have been occupying he can't have been occupying we can't have been occupying you can't have been occupying they can't have been occupying
Interrogative form
Simple form
can I occupy? can you occupy? can he occupy? can we occupy? can you occupy? can they occupy?
V-ing form
can I be occupying? can you be occupying? can he be occupying? can we be occupying? can you be occupying? can they be occupying?
Perfect
can I have occupied? can you have occupied? can he have occupied? can we have occupied? can you have occupied? can they have occupied?
V-ing perfect
can I have been occupying? can you have been occupying? can he have been occupying? can we have been occupying? can you have been occupying? can they have been occupying?
Interro-negative form
Simple form
can't I occupy? can't you occupy? can't he occupy? can't we occupy? can't you occupy? can't they occupy?
V-ing form
can't I be occupying? can't you be occupying? can't he be occupying? can't we be occupying? can't you be occupying? can't they be occupying?
Perfect
can't I have occupied? can't you have occupied? can't he have occupied? can't we have occupied? can't you have occupied? can't they have occupied?
V-ing perfect
can't I have been occupying? can't you have been occupying? can't he have been occupying? can't we have been occupying? can't you have been occupying? can't they have been occupying?