I can engulf you can engulf she can engulf we can engulf you can engulf they can engulf
V-ing form
I can be engulfing you can be engulfing she can be engulfing we can be engulfing you can be engulfing they can be engulfing
Perfect
I can have engulfed you can have engulfed she 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 she 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 she 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 she 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 she 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 she 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 she engulf? can we engulf? can you engulf? can they engulf?
V-ing form
can I be engulfing? can you be engulfing? can she be engulfing? can we be engulfing? can you be engulfing? can they be engulfing?
Perfect
can I have engulfed? can you have engulfed? can she 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 she 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 she 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 she 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 she 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 she have been engulfing? can't we have been engulfing? can't you have been engulfing? can't they have been engulfing?