must co-star
Verbo regular: co-star - co-stared- co-stared

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

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

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

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