I can cater you can cater she can cater we can cater you can cater they can cater
V-ing form
I can be catering you can be catering she can be catering we can be catering you can be catering they can be catering
Perfect
I can have catered you can have catered she can have catered we can have catered you can have catered they can have catered
V-ing perfect
I can have been catering you can have been catering she can have been catering we can have been catering you can have been catering they can have been catering
Negation
Simple form
I can't cater you can't cater she can't cater we can't cater you can't cater they can't cater
V-ing form
I can't be catering you can't be catering she can't be catering we can't be catering you can't be catering they can't be catering
Perfect
I can't have catered you can't have catered she can't have catered we can't have catered you can't have catered they can't have catered
V-ing perfect
I can't have been catering you can't have been catering she can't have been catering we can't have been catering you can't have been catering they can't have been catering
Interrogative form
Simple form
can I cater? can you cater? can she cater? can we cater? can you cater? can they cater?
V-ing form
can I be catering? can you be catering? can she be catering? can we be catering? can you be catering? can they be catering?
Perfect
can I have catered? can you have catered? can she have catered? can we have catered? can you have catered? can they have catered?
V-ing perfect
can I have been catering? can you have been catering? can she have been catering? can we have been catering? can you have been catering? can they have been catering?
Interro-negative form
Simple form
can't I cater? can't you cater? can't she cater? can't we cater? can't you cater? can't they cater?
V-ing form
can't I be catering? can't you be catering? can't she be catering? can't we be catering? can't you be catering? can't they be catering?
Perfect
can't I have catered? can't you have catered? can't she have catered? can't we have catered? can't you have catered? can't they have catered?
V-ing perfect
can't I have been catering? can't you have been catering? can't she have been catering? can't we have been catering? can't you have been catering? can't they have been catering?