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 cannot prework you cannot prework he cannot prework we cannot prework you cannot prework they cannot prework	I cannot be preworking you cannot be preworking he cannot be preworking we cannot be preworking you cannot be preworking they cannot be preworking
Perfect	V-ing perfect
I cannot have preworked you cannot have preworked he cannot have preworked we cannot have preworked you cannot have preworked they cannot have preworked	I cannot have been preworking you cannot have been preworking he cannot have been preworking we cannot have been preworking you cannot have been preworking they cannot 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 I not prework? can you not prework? can he not prework? can we not prework? can you not prework? can they not prework?	can I not be preworking? can you not be preworking? can he not be preworking? can we not be preworking? can you not be preworking? can they not be preworking?
Perfect	V-ing perfect
can I not have preworked? can you not have preworked? can he not have preworked? can we not have preworked? can you not have preworked? can they not have preworked?	can I not have been preworking? can you not have been preworking? can he not have been preworking? can we not have been preworking? can you not have been preworking? can they not have been preworking?