I can engulf you can engulf he can engulf we can engulf you can engulf they can engulf
V-ing form
I can be engulfing you can be engulfing he can be engulfing we can be engulfing you can be engulfing they can be engulfing
Perfect
I can have engulfed you can have engulfed he can have engulfed we can have engulfed you can have engulfed they can have engulfed
V-ing perfect
I can have been engulfing you can have been engulfing he can have been engulfing we can have been engulfing you can have been engulfing they can have been engulfing
Negation
Simple form
I can't engulf you can't engulf he can't engulf we can't engulf you can't engulf they can't engulf
V-ing form
I can't be engulfing you can't be engulfing he can't be engulfing we can't be engulfing you can't be engulfing they can't be engulfing
Perfect
I can't have engulfed you can't have engulfed he can't have engulfed we can't have engulfed you can't have engulfed they can't have engulfed
V-ing perfect
I can't have been engulfing you can't have been engulfing he can't have been engulfing we can't have been engulfing you can't have been engulfing they can't have been engulfing
Interrogative form
Simple form
can I engulf? can you engulf? can he engulf? can we engulf? can you engulf? can they engulf?
V-ing form
can I be engulfing? can you be engulfing? can he be engulfing? can we be engulfing? can you be engulfing? can they be engulfing?
Perfect
can I have engulfed? can you have engulfed? can he have engulfed? can we have engulfed? can you have engulfed? can they have engulfed?
V-ing perfect
can I have been engulfing? can you have been engulfing? can he have been engulfing? can we have been engulfing? can you have been engulfing? can they have been engulfing?
Interro-negative form
Simple form
can't I engulf? can't you engulf? can't he engulf? can't we engulf? can't you engulf? can't they engulf?
V-ing form
can't I be engulfing? can't you be engulfing? can't he be engulfing? can't we be engulfing? can't you be engulfing? can't they be engulfing?
Perfect
can't I have engulfed? can't you have engulfed? can't he have engulfed? can't we have engulfed? can't you have engulfed? can't they have engulfed?
V-ing perfect
can't I have been engulfing? can't you have been engulfing? can't he have been engulfing? can't we have been engulfing? can't you have been engulfing? can't they have been engulfing?