English verb conjugation
COULD STAR

Regular verb: star - starred - starred

Affirmation

Simple form	V-ing form
I could star you could star he could star we could star you could star they could star	I could be starring you could be starring he could be starring we could be starring you could be starring they could be starring
Perfect	V-ing perfect
I could have starred you could have starred he could have starred we could have starred you could have starred they could have starred	I could have been starring you could have been starring he could have been starring we could have been starring you could have been starring they could have been starring

Negation

Simple form	V-ing form
I could not star you could not star he could not star we could not star you could not star they could not star	I could not be starring you could not be starring he could not be starring we could not be starring you could not be starring they could not be starring
Perfect	V-ing perfect
I could not have starred you could not have starred he could not have starred we could not have starred you could not have starred they could not have starred	I could not have been starring you could not have been starring he could not have been starring we could not have been starring you could not have been starring they could not have been starring

Interrogative form

Simple form	V-ing form
could I star? could you star? could he star? could we star? could you star? could they star?	could I be starring? could you be starring? could he be starring? could we be starring? could you be starring? could they be starring?
Perfect	V-ing perfect
could I have starred? could you have starred? could he have starred? could we have starred? could you have starred? could they have starred?	could I have been starring? could you have been starring? could he have been starring? could we have been starring? could you have been starring? could they have been starring?

Interro-negative form

Simple form	V-ing form
could I not star? could you not star? could he not star? could we not star? could you not star? could they not star?	could I not be starring? could you not be starring? could he not be starring? could we not be starring? could you not be starring? could they not be starring?
Perfect	V-ing perfect
could I not have starred? could you not have starred? could he not have starred? could we not have starred? could you not have starred? could they not have starred?	could I not have been starring? could you not have been starring? could he not have been starring? could we not have been starring? could you not have been starring? could they not have been starring?