I can scare you can scare he can scare we can scare you can scare they can scare
V-ing form
I can be scaring you can be scaring he can be scaring we can be scaring you can be scaring they can be scaring
Perfect
I can have scared you can have scared he can have scared we can have scared you can have scared they can have scared
V-ing perfect
I can have been scaring you can have been scaring he can have been scaring we can have been scaring you can have been scaring they can have been scaring
Negation
Simple form
I cannot scare you cannot scare he cannot scare we cannot scare you cannot scare they cannot scare
V-ing form
I cannot be scaring you cannot be scaring he cannot be scaring we cannot be scaring you cannot be scaring they cannot be scaring
Perfect
I cannot have scared you cannot have scared he cannot have scared we cannot have scared you cannot have scared they cannot have scared
V-ing perfect
I cannot have been scaring you cannot have been scaring he cannot have been scaring we cannot have been scaring you cannot have been scaring they cannot have been scaring
Interrogative form
Simple form
can I scare? can you scare? can he scare? can we scare? can you scare? can they scare?
V-ing form
can I be scaring? can you be scaring? can he be scaring? can we be scaring? can you be scaring? can they be scaring?
Perfect
can I have scared? can you have scared? can he have scared? can we have scared? can you have scared? can they have scared?
V-ing perfect
can I have been scaring? can you have been scaring? can he have been scaring? can we have been scaring? can you have been scaring? can they have been scaring?
Interro-negative form
Simple form
can I not scare? can you not scare? can he not scare? can we not scare? can you not scare? can they not scare?
V-ing form
can I not be scaring? can you not be scaring? can he not be scaring? can we not be scaring? can you not be scaring? can they not be scaring?
Perfect
can I not have scared? can you not have scared? can he not have scared? can we not have scared? can you not have scared? can they not have scared?
V-ing perfect
can I not have been scaring? can you not have been scaring? can he not have been scaring? can we not have been scaring? can you not have been scaring? can they not have been scaring?