English verb conjugation
COULD UNDERWORK

Regular verb: underwork - underworked - underworked

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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