could co-star
Verbo regular: co-star - co-stared- co-stared

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could co-star
you could co-star
he could co-star
we could co-star
you could co-star
they could co-star 	I could be co-staring
you could be co-staring
he could be co-staring
we could be co-staring
you could be co-staring
they could be co-staring	I could have co-stared
you could have co-stared
he could have co-stared
we could have co-stared
you could have co-stared
they could have co-stared	I could have been co-staring
you could have been co-staring
he could have been co-staring
we could have been co-staring
you could have been co-staring
they could have been co-staring	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not co-star
you could not co-star
he could not co-star
we could not co-star
you could not co-star
they could not co-star 	I could not be co-staring
you could not be co-staring
he could not be co-staring
we could not be co-staring
you could not be co-staring
they could not be co-staring	I could not have co-stared
you could not have co-stared
he could not have co-stared
we could not have co-stared
you could not have co-stared
they could not have co-stared	I could not have been co-staring
you could not have been co-staring
he could not have been co-staring
we could not have been co-staring
you could not have been co-staring
they could not have been co-staring	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I co-star?
could you co-star?
could he co-star?
could we co-star?
could you co-star?
could they co-star? 	could I be co-staring?
could you be co-staring?
could he be co-staring?
could we be co-staring?
could you be co-staring?
could they be co-staring? 	could I have co-stared?
could you have co-stared?
could he have co-stared?
could we have co-stared?
could you have co-stared?
could they have co-stared? 	could I have been co-staring?
could you have been co-staring?
could he have been co-staring?
could we have been co-staring?
could you have been co-staring?
could they have been co-staring? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not co-star?
could you not co-star?
could he not co-star?
could we not co-star?
could you not co-star?
could they not co-star? 	could I not be co-staring?
could you not be co-staring?
could he not be co-staring?
could we not be co-staring?
could you not be co-staring?
could they not be co-staring? 	could I not have co-stared?
could you not have co-stared?
could he not have co-stared?
could we not have co-stared?
could you not have co-stared?
could they not have co-stared? 	could I not have been co-staring?
could you not have been co-staring?
could he not have been co-staring?
could we not have been co-staring?
could you not have been co-staring?
could they not have been co-staring?