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 couldn't star you couldn't star he couldn't star we couldn't star you couldn't star they couldn't star	I couldn't be starring you couldn't be starring he couldn't be starring we couldn't be starring you couldn't be starring they couldn't be starring
Perfect	V-ing perfect
I couldn't have starred you couldn't have starred he couldn't have starred we couldn't have starred you couldn't have starred they couldn't have starred	I couldn't have been starring you couldn't have been starring he couldn't have been starring we couldn't have been starring you couldn't have been starring they couldn't 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
couldn't I star? couldn't you star? couldn't he star? couldn't we star? couldn't you star? couldn't they star?	couldn't I be starring? couldn't you be starring? couldn't he be starring? couldn't we be starring? couldn't you be starring? couldn't they be starring?
Perfect	V-ing perfect
couldn't I have starred? couldn't you have starred? couldn't he have starred? couldn't we have starred? couldn't you have starred? couldn't they have starred?	couldn't I have been starring? couldn't you have been starring? couldn't he have been starring? couldn't we have been starring? couldn't you have been starring? couldn't they have been starring?