English verb conjugation
COULD OVERWORK

Regular verb: overwork - overworked - overworked

Affirmation

Simple form	V-ing form
I could overwork you could overwork she could overwork we could overwork you could overwork they could overwork	I could be overworking you could be overworking she could be overworking we could be overworking you could be overworking they could be overworking
Perfect	V-ing perfect
I could have overworked you could have overworked she could have overworked we could have overworked you could have overworked they could have overworked	I could have been overworking you could have been overworking she could have been overworking we could have been overworking you could have been overworking they could have been overworking

Negation

Simple form	V-ing form
I couldn't overwork you couldn't overwork she couldn't overwork we couldn't overwork you couldn't overwork they couldn't overwork	I couldn't be overworking you couldn't be overworking she couldn't be overworking we couldn't be overworking you couldn't be overworking they couldn't be overworking
Perfect	V-ing perfect
I couldn't have overworked you couldn't have overworked she couldn't have overworked we couldn't have overworked you couldn't have overworked they couldn't have overworked	I couldn't have been overworking you couldn't have been overworking she couldn't have been overworking we couldn't have been overworking you couldn't have been overworking they couldn't have been overworking

Interrogative form

Simple form	V-ing form
could I overwork? could you overwork? could she overwork? could we overwork? could you overwork? could they overwork?	could I be overworking? could you be overworking? could she be overworking? could we be overworking? could you be overworking? could they be overworking?
Perfect	V-ing perfect
could I have overworked? could you have overworked? could she have overworked? could we have overworked? could you have overworked? could they have overworked?	could I have been overworking? could you have been overworking? could she have been overworking? could we have been overworking? could you have been overworking? could they have been overworking?

Interro-negative form

Simple form	V-ing form
couldn't I overwork? couldn't you overwork? couldn't she overwork? couldn't we overwork? couldn't you overwork? couldn't they overwork?	couldn't I be overworking? couldn't you be overworking? couldn't she be overworking? couldn't we be overworking? couldn't you be overworking? couldn't they be overworking?
Perfect	V-ing perfect
couldn't I have overworked? couldn't you have overworked? couldn't she have overworked? couldn't we have overworked? couldn't you have overworked? couldn't they have overworked?	couldn't I have been overworking? couldn't you have been overworking? couldn't she have been overworking? couldn't we have been overworking? couldn't you have been overworking? couldn't they have been overworking?