English verb conjugation
MUST INGULF

Regular verb: ingulf - ingulfed - ingulfed

Affirmation

Simple form	V-ing form
I must ingulf you must ingulf he must ingulf we must ingulf you must ingulf they must ingulf	I must be ingulfing you must be ingulfing he must be ingulfing we must be ingulfing you must be ingulfing they must be ingulfing
Perfect	V-ing perfect
I must have ingulfed you must have ingulfed he must have ingulfed we must have ingulfed you must have ingulfed they must have ingulfed	I must have been ingulfing you must have been ingulfing he must have been ingulfing we must have been ingulfing you must have been ingulfing they must have been ingulfing

Negation

Simple form	V-ing form
I must not ingulf you must not ingulf he must not ingulf we must not ingulf you must not ingulf they must not ingulf	I must not be ingulfing you must not be ingulfing he must not be ingulfing we must not be ingulfing you must not be ingulfing they must not be ingulfing
Perfect	V-ing perfect
I must not have ingulfed you must not have ingulfed he must not have ingulfed we must not have ingulfed you must not have ingulfed they must not have ingulfed	I must not have been ingulfing you must not have been ingulfing he must not have been ingulfing we must not have been ingulfing you must not have been ingulfing they must not have been ingulfing

Interrogative form

Simple form	V-ing form
must I ingulf? must you ingulf? must he ingulf? must we ingulf? must you ingulf? must they ingulf?	must I be ingulfing? must you be ingulfing? must he be ingulfing? must we be ingulfing? must you be ingulfing? must they be ingulfing?
Perfect	V-ing perfect
must I have ingulfed? must you have ingulfed? must he have ingulfed? must we have ingulfed? must you have ingulfed? must they have ingulfed?	must I have been ingulfing? must you have been ingulfing? must he have been ingulfing? must we have been ingulfing? must you have been ingulfing? must they have been ingulfing?

Interro-negative form

Simple form	V-ing form
must I not ingulf? must you not ingulf? must he not ingulf? must we not ingulf? must you not ingulf? must they not ingulf?	must I not be ingulfing? must you not be ingulfing? must he not be ingulfing? must we not be ingulfing? must you not be ingulfing? must they not be ingulfing?
Perfect	V-ing perfect
must I not have ingulfed? must you not have ingulfed? must he not have ingulfed? must we not have ingulfed? must you not have ingulfed? must they not have ingulfed?	must I not have been ingulfing? must you not have been ingulfing? must he not have been ingulfing? must we not have been ingulfing? must you not have been ingulfing? must they not have been ingulfing?