I can fatten you can fatten he can fatten we can fatten you can fatten they can fatten
V-ing form
I can be fattening you can be fattening he can be fattening we can be fattening you can be fattening they can be fattening
Perfect
I can have fattened you can have fattened he can have fattened we can have fattened you can have fattened they can have fattened
V-ing perfect
I can have been fattening you can have been fattening he can have been fattening we can have been fattening you can have been fattening they can have been fattening
Negation
Simple form
I can't fatten you can't fatten he can't fatten we can't fatten you can't fatten they can't fatten
V-ing form
I can't be fattening you can't be fattening he can't be fattening we can't be fattening you can't be fattening they can't be fattening
Perfect
I can't have fattened you can't have fattened he can't have fattened we can't have fattened you can't have fattened they can't have fattened
V-ing perfect
I can't have been fattening you can't have been fattening he can't have been fattening we can't have been fattening you can't have been fattening they can't have been fattening
Interrogative form
Simple form
can I fatten? can you fatten? can he fatten? can we fatten? can you fatten? can they fatten?
V-ing form
can I be fattening? can you be fattening? can he be fattening? can we be fattening? can you be fattening? can they be fattening?
Perfect
can I have fattened? can you have fattened? can he have fattened? can we have fattened? can you have fattened? can they have fattened?
V-ing perfect
can I have been fattening? can you have been fattening? can he have been fattening? can we have been fattening? can you have been fattening? can they have been fattening?
Interro-negative form
Simple form
can't I fatten? can't you fatten? can't he fatten? can't we fatten? can't you fatten? can't they fatten?
V-ing form
can't I be fattening? can't you be fattening? can't he be fattening? can't we be fattening? can't you be fattening? can't they be fattening?
Perfect
can't I have fattened? can't you have fattened? can't he have fattened? can't we have fattened? can't you have fattened? can't they have fattened?
V-ing perfect
can't I have been fattening? can't you have been fattening? can't he have been fattening? can't we have been fattening? can't you have been fattening? can't they have been fattening?