English verb conjugation
CAN PREWORK

Regular verb: prework - preworked - preworked

Affirmation

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

Negation

Simple form	V-ing form
I can't prework you can't prework he can't prework we can't prework you can't prework they can't prework	I can't be preworking you can't be preworking he can't be preworking we can't be preworking you can't be preworking they can't be preworking
Perfect	V-ing perfect
I can't have preworked you can't have preworked he can't have preworked we can't have preworked you can't have preworked they can't have preworked	I can't have been preworking you can't have been preworking he can't have been preworking we can't have been preworking you can't have been preworking they can't have been preworking

Interrogative form

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

Interro-negative form

Simple form	V-ing form
can't I prework? can't you prework? can't he prework? can't we prework? can't you prework? can't they prework?	can't I be preworking? can't you be preworking? can't he be preworking? can't we be preworking? can't you be preworking? can't they be preworking?
Perfect	V-ing perfect
can't I have preworked? can't you have preworked? can't he have preworked? can't we have preworked? can't you have preworked? can't they have preworked?	can't I have been preworking? can't you have been preworking? can't he have been preworking? can't we have been preworking? can't you have been preworking? can't they have been preworking?