I can clatter you can clatter he can clatter we can clatter you can clatter they can clatter
V-ing form
I can be clattering you can be clattering he can be clattering we can be clattering you can be clattering they can be clattering
Perfect
I can have clattered you can have clattered he can have clattered we can have clattered you can have clattered they can have clattered
V-ing perfect
I can have been clattering you can have been clattering he can have been clattering we can have been clattering you can have been clattering they can have been clattering
Negation
Simple form
I can't clatter you can't clatter he can't clatter we can't clatter you can't clatter they can't clatter
V-ing form
I can't be clattering you can't be clattering he can't be clattering we can't be clattering you can't be clattering they can't be clattering
Perfect
I can't have clattered you can't have clattered he can't have clattered we can't have clattered you can't have clattered they can't have clattered
V-ing perfect
I can't have been clattering you can't have been clattering he can't have been clattering we can't have been clattering you can't have been clattering they can't have been clattering
Interrogative form
Simple form
can I clatter? can you clatter? can he clatter? can we clatter? can you clatter? can they clatter?
V-ing form
can I be clattering? can you be clattering? can he be clattering? can we be clattering? can you be clattering? can they be clattering?
Perfect
can I have clattered? can you have clattered? can he have clattered? can we have clattered? can you have clattered? can they have clattered?
V-ing perfect
can I have been clattering? can you have been clattering? can he have been clattering? can we have been clattering? can you have been clattering? can they have been clattering?
Interro-negative form
Simple form
can't I clatter? can't you clatter? can't he clatter? can't we clatter? can't you clatter? can't they clatter?
V-ing form
can't I be clattering? can't you be clattering? can't he be clattering? can't we be clattering? can't you be clattering? can't they be clattering?
Perfect
can't I have clattered? can't you have clattered? can't he have clattered? can't we have clattered? can't you have clattered? can't they have clattered?
V-ing perfect
can't I have been clattering? can't you have been clattering? can't he have been clattering? can't we have been clattering? can't you have been clattering? can't they have been clattering?