English verb conjugation
COULD WORK

Regular verb: work - worked - worked

Affirmation

Simple form	V-ing form
I could work you could work he could work we could work you could work they could work	I could be working you could be working he could be working we could be working you could be working they could be working
Perfect	V-ing perfect
I could have worked you could have worked he could have worked we could have worked you could have worked they could have worked	I could have been working you could have been working he could have been working we could have been working you could have been working they could have been working

Negation

Simple form	V-ing form
I couldn't work you couldn't work he couldn't work we couldn't work you couldn't work they couldn't work	I couldn't be working you couldn't be working he couldn't be working we couldn't be working you couldn't be working they couldn't be working
Perfect	V-ing perfect
I couldn't have worked you couldn't have worked he couldn't have worked we couldn't have worked you couldn't have worked they couldn't have worked	I couldn't have been working you couldn't have been working he couldn't have been working we couldn't have been working you couldn't have been working they couldn't have been working

Interrogative form

Simple form	V-ing form
could I work? could you work? could he work? could we work? could you work? could they work?	could I be working? could you be working? could he be working? could we be working? could you be working? could they be working?
Perfect	V-ing perfect
could I have worked? could you have worked? could he have worked? could we have worked? could you have worked? could they have worked?	could I have been working? could you have been working? could he have been working? could we have been working? could you have been working? could they have been working?

Interro-negative form

Simple form	V-ing form
couldn't I work? couldn't you work? couldn't he work? couldn't we work? couldn't you work? couldn't they work?	couldn't I be working? couldn't you be working? couldn't he be working? couldn't we be working? couldn't you be working? couldn't they be working?
Perfect	V-ing perfect
couldn't I have worked? couldn't you have worked? couldn't he have worked? couldn't we have worked? couldn't you have worked? couldn't they have worked?	couldn't I have been working? couldn't you have been working? couldn't he have been working? couldn't we have been working? couldn't you have been working? couldn't they have been working?