I can narrow you can narrow he can narrow we can narrow you can narrow they can narrow
V-ing form
I can be narrowing you can be narrowing he can be narrowing we can be narrowing you can be narrowing they can be narrowing
Perfect
I can have narrowed you can have narrowed he can have narrowed we can have narrowed you can have narrowed they can have narrowed
V-ing perfect
I can have been narrowing you can have been narrowing he can have been narrowing we can have been narrowing you can have been narrowing they can have been narrowing
Negation
Simple form
I can't narrow you can't narrow he can't narrow we can't narrow you can't narrow they can't narrow
V-ing form
I can't be narrowing you can't be narrowing he can't be narrowing we can't be narrowing you can't be narrowing they can't be narrowing
Perfect
I can't have narrowed you can't have narrowed he can't have narrowed we can't have narrowed you can't have narrowed they can't have narrowed
V-ing perfect
I can't have been narrowing you can't have been narrowing he can't have been narrowing we can't have been narrowing you can't have been narrowing they can't have been narrowing
Interrogative form
Simple form
can I narrow? can you narrow? can he narrow? can we narrow? can you narrow? can they narrow?
V-ing form
can I be narrowing? can you be narrowing? can he be narrowing? can we be narrowing? can you be narrowing? can they be narrowing?
Perfect
can I have narrowed? can you have narrowed? can he have narrowed? can we have narrowed? can you have narrowed? can they have narrowed?
V-ing perfect
can I have been narrowing? can you have been narrowing? can he have been narrowing? can we have been narrowing? can you have been narrowing? can they have been narrowing?
Interro-negative form
Simple form
can't I narrow? can't you narrow? can't he narrow? can't we narrow? can't you narrow? can't they narrow?
V-ing form
can't I be narrowing? can't you be narrowing? can't he be narrowing? can't we be narrowing? can't you be narrowing? can't they be narrowing?
Perfect
can't I have narrowed? can't you have narrowed? can't he have narrowed? can't we have narrowed? can't you have narrowed? can't they have narrowed?
V-ing perfect
can't I have been narrowing? can't you have been narrowing? can't he have been narrowing? can't we have been narrowing? can't you have been narrowing? can't they have been narrowing?