English verb conjugation
CAN UNDERWORK

Regular verb: underwork - underworked - underworked

Affirmation

Simple form	V-ing form
I can underwork you can underwork he can underwork we can underwork you can underwork they can underwork	I can be underworking you can be underworking he can be underworking we can be underworking you can be underworking they can be underworking
Perfect	V-ing perfect
I can have underworked you can have underworked he can have underworked we can have underworked you can have underworked they can have underworked	I can have been underworking you can have been underworking he can have been underworking we can have been underworking you can have been underworking they can have been underworking

Negation

Simple form	V-ing form
I cannot underwork you cannot underwork he cannot underwork we cannot underwork you cannot underwork they cannot underwork	I cannot be underworking you cannot be underworking he cannot be underworking we cannot be underworking you cannot be underworking they cannot be underworking
Perfect	V-ing perfect
I cannot have underworked you cannot have underworked he cannot have underworked we cannot have underworked you cannot have underworked they cannot have underworked	I cannot have been underworking you cannot have been underworking he cannot have been underworking we cannot have been underworking you cannot have been underworking they cannot have been underworking

Interrogative form

Simple form	V-ing form
can I underwork? can you underwork? can he underwork? can we underwork? can you underwork? can they underwork?	can I be underworking? can you be underworking? can he be underworking? can we be underworking? can you be underworking? can they be underworking?
Perfect	V-ing perfect
can I have underworked? can you have underworked? can he have underworked? can we have underworked? can you have underworked? can they have underworked?	can I have been underworking? can you have been underworking? can he have been underworking? can we have been underworking? can you have been underworking? can they have been underworking?

Interro-negative form

Simple form	V-ing form
can I not underwork? can you not underwork? can he not underwork? can we not underwork? can you not underwork? can they not underwork?	can I not be underworking? can you not be underworking? can he not be underworking? can we not be underworking? can you not be underworking? can they not be underworking?
Perfect	V-ing perfect
can I not have underworked? can you not have underworked? can he not have underworked? can we not have underworked? can you not have underworked? can they not have underworked?	can I not have been underworking? can you not have been underworking? can he not have been underworking? can we not have been underworking? can you not have been underworking? can they not have been underworking?