English verb conjugation
COULD GUEST-STAR

Regular verb: guest-star - guest-stared - guest-stared

Affirmation

Simple form	V-ing form
I could guest-star you could guest-star he could guest-star we could guest-star you could guest-star they could guest-star	I could be guest-staring you could be guest-staring he could be guest-staring we could be guest-staring you could be guest-staring they could be guest-staring
Perfect	V-ing perfect
I could have guest-stared you could have guest-stared he could have guest-stared we could have guest-stared you could have guest-stared they could have guest-stared	I could have been guest-staring you could have been guest-staring he could have been guest-staring we could have been guest-staring you could have been guest-staring they could have been guest-staring

Negation

Simple form	V-ing form
I could not guest-star you could not guest-star he could not guest-star we could not guest-star you could not guest-star they could not guest-star	I could not be guest-staring you could not be guest-staring he could not be guest-staring we could not be guest-staring you could not be guest-staring they could not be guest-staring
Perfect	V-ing perfect
I could not have guest-stared you could not have guest-stared he could not have guest-stared we could not have guest-stared you could not have guest-stared they could not have guest-stared	I could not have been guest-staring you could not have been guest-staring he could not have been guest-staring we could not have been guest-staring you could not have been guest-staring they could not have been guest-staring

Interrogative form

Simple form	V-ing form
could I guest-star? could you guest-star? could he guest-star? could we guest-star? could you guest-star? could they guest-star?	could I be guest-staring? could you be guest-staring? could he be guest-staring? could we be guest-staring? could you be guest-staring? could they be guest-staring?
Perfect	V-ing perfect
could I have guest-stared? could you have guest-stared? could he have guest-stared? could we have guest-stared? could you have guest-stared? could they have guest-stared?	could I have been guest-staring? could you have been guest-staring? could he have been guest-staring? could we have been guest-staring? could you have been guest-staring? could they have been guest-staring?

Interro-negative form

Simple form	V-ing form
could I not guest-star? could you not guest-star? could he not guest-star? could we not guest-star? could you not guest-star? could they not guest-star?	could I not be guest-staring? could you not be guest-staring? could he not be guest-staring? could we not be guest-staring? could you not be guest-staring? could they not be guest-staring?
Perfect	V-ing perfect
could I not have guest-stared? could you not have guest-stared? could he not have guest-stared? could we not have guest-stared? could you not have guest-stared? could they not have guest-stared?	could I not have been guest-staring? could you not have been guest-staring? could he not have been guest-staring? could we not have been guest-staring? could you not have been guest-staring? could they not have been guest-staring?