I can stagger you can stagger he can stagger we can stagger you can stagger they can stagger
V-ing form
I can be staggering you can be staggering he can be staggering we can be staggering you can be staggering they can be staggering
Perfect
I can have staggered you can have staggered he can have staggered we can have staggered you can have staggered they can have staggered
V-ing perfect
I can have been staggering you can have been staggering he can have been staggering we can have been staggering you can have been staggering they can have been staggering
Negation
Simple form
I can't stagger you can't stagger he can't stagger we can't stagger you can't stagger they can't stagger
V-ing form
I can't be staggering you can't be staggering he can't be staggering we can't be staggering you can't be staggering they can't be staggering
Perfect
I can't have staggered you can't have staggered he can't have staggered we can't have staggered you can't have staggered they can't have staggered
V-ing perfect
I can't have been staggering you can't have been staggering he can't have been staggering we can't have been staggering you can't have been staggering they can't have been staggering
Interrogative form
Simple form
can I stagger? can you stagger? can he stagger? can we stagger? can you stagger? can they stagger?
V-ing form
can I be staggering? can you be staggering? can he be staggering? can we be staggering? can you be staggering? can they be staggering?
Perfect
can I have staggered? can you have staggered? can he have staggered? can we have staggered? can you have staggered? can they have staggered?
V-ing perfect
can I have been staggering? can you have been staggering? can he have been staggering? can we have been staggering? can you have been staggering? can they have been staggering?
Interro-negative form
Simple form
can't I stagger? can't you stagger? can't he stagger? can't we stagger? can't you stagger? can't they stagger?
V-ing form
can't I be staggering? can't you be staggering? can't he be staggering? can't we be staggering? can't you be staggering? can't they be staggering?
Perfect
can't I have staggered? can't you have staggered? can't he have staggered? can't we have staggered? can't you have staggered? can't they have staggered?
V-ing perfect
can't I have been staggering? can't you have been staggering? can't he have been staggering? can't we have been staggering? can't you have been staggering? can't they have been staggering?