English verb conjugation
MUST PREWORK

Regular verb: prework - preworked - preworked

Affirmation

Simple form	V-ing form
I must prework you must prework he must prework we must prework you must prework they must prework	I must be preworking you must be preworking he must be preworking we must be preworking you must be preworking they must be preworking
Perfect	V-ing perfect
I must have preworked you must have preworked he must have preworked we must have preworked you must have preworked they must have preworked	I must have been preworking you must have been preworking he must have been preworking we must have been preworking you must have been preworking they must have been preworking

Negation

Simple form	V-ing form
I must not prework you must not prework he must not prework we must not prework you must not prework they must not prework	I must not be preworking you must not be preworking he must not be preworking we must not be preworking you must not be preworking they must not be preworking
Perfect	V-ing perfect
I must not have preworked you must not have preworked he must not have preworked we must not have preworked you must not have preworked they must not have preworked	I must not have been preworking you must not have been preworking he must not have been preworking we must not have been preworking you must not have been preworking they must not have been preworking

Interrogative form

Simple form	V-ing form
must I prework? must you prework? must he prework? must we prework? must you prework? must they prework?	must I be preworking? must you be preworking? must he be preworking? must we be preworking? must you be preworking? must they be preworking?
Perfect	V-ing perfect
must I have preworked? must you have preworked? must he have preworked? must we have preworked? must you have preworked? must they have preworked?	must I have been preworking? must you have been preworking? must he have been preworking? must we have been preworking? must you have been preworking? must they have been preworking?

Interro-negative form

Simple form	V-ing form
must I not prework? must you not prework? must he not prework? must we not prework? must you not prework? must they not prework?	must I not be preworking? must you not be preworking? must he not be preworking? must we not be preworking? must you not be preworking? must they not be preworking?
Perfect	V-ing perfect
must I not have preworked? must you not have preworked? must he not have preworked? must we not have preworked? must you not have preworked? must they not have preworked?	must I not have been preworking? must you not have been preworking? must he not have been preworking? must we not have been preworking? must you not have been preworking? must they not have been preworking?