I can stare you can stare she can stare we can stare you can stare they can stare
V-ing form
I can be staring you can be staring she can be staring we can be staring you can be staring they can be staring
Perfect
I can have stared you can have stared she can have stared we can have stared you can have stared they can have stared
V-ing perfect
I can have been staring you can have been staring she can have been staring we can have been staring you can have been staring they can have been staring
Negation
Simple form
I can't stare you can't stare she can't stare we can't stare you can't stare they can't stare
V-ing form
I can't be staring you can't be staring she can't be staring we can't be staring you can't be staring they can't be staring
Perfect
I can't have stared you can't have stared she can't have stared we can't have stared you can't have stared they can't have stared
V-ing perfect
I can't have been staring you can't have been staring she can't have been staring we can't have been staring you can't have been staring they can't have been staring
Interrogative form
Simple form
can I stare? can you stare? can she stare? can we stare? can you stare? can they stare?
V-ing form
can I be staring? can you be staring? can she be staring? can we be staring? can you be staring? can they be staring?
Perfect
can I have stared? can you have stared? can she have stared? can we have stared? can you have stared? can they have stared?
V-ing perfect
can I have been staring? can you have been staring? can she have been staring? can we have been staring? can you have been staring? can they have been staring?
Interro-negative form
Simple form
can't I stare? can't you stare? can't she stare? can't we stare? can't you stare? can't they stare?
V-ing form
can't I be staring? can't you be staring? can't she be staring? can't we be staring? can't you be staring? can't they be staring?
Perfect
can't I have stared? can't you have stared? can't she have stared? can't we have stared? can't you have stared? can't they have stared?
V-ing perfect
can't I have been staring? can't you have been staring? can't she have been staring? can't we have been staring? can't you have been staring? can't they have been staring?