must choir
Verbo regular: choir - choired- choired

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must choir
you must choir
he must choir
we must choir
you must choir
they must choir 	I must be choiring
you must be choiring
he must be choiring
we must be choiring
you must be choiring
they must be choiring	I must have choired
you must have choired
he must have choired
we must have choired
you must have choired
they must have choired	I must have been choiring
you must have been choiring
he must have been choiring
we must have been choiring
you must have been choiring
they must have been choiring	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't choir
you mustn't choir
he mustn't choir
we mustn't choir
you mustn't choir
they mustn't choir 	I mustn't be choiring
you mustn't be choiring
he mustn't be choiring
we mustn't be choiring
you mustn't be choiring
they mustn't be choiring	I mustn't have choired
you mustn't have choired
he mustn't have choired
we mustn't have choired
you mustn't have choired
they mustn't have choired	I mustn't have been choiring
you mustn't have been choiring
he mustn't have been choiring
we mustn't have been choiring
you mustn't have been choiring
they mustn't have been choiring	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I choir?
must you choir?
must he choir?
must we choir?
must you choir?
must they choir? 	must I be choiring?
must you be choiring?
must he be choiring?
must we be choiring?
must you be choiring?
must they be choiring? 	must I have choired?
must you have choired?
must he have choired?
must we have choired?
must you have choired?
must they have choired? 	must I have been choiring?
must you have been choiring?
must he have been choiring?
must we have been choiring?
must you have been choiring?
must they have been choiring? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I choir?
mustn't you choir?
mustn't he choir?
mustn't we choir?
mustn't you choir?
mustn't they choir? 	mustn't I be choiring?
mustn't you be choiring?
mustn't he be choiring?
mustn't we be choiring?
mustn't you be choiring?
mustn't they be choiring? 	mustn't I have choired?
mustn't you have choired?
mustn't he have choired?
mustn't we have choired?
mustn't you have choired?
mustn't they have choired? 	mustn't I have been choiring?
mustn't you have been choiring?
mustn't he have been choiring?
mustn't we have been choiring?
mustn't you have been choiring?
mustn't they have been choiring?