must roost
Verbo regular: roost - roosted- roosted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must roost
you must roost
he must roost
we must roost
you must roost
they must roost 	I must be roosting
you must be roosting
he must be roosting
we must be roosting
you must be roosting
they must be roosting	I must have roosted
you must have roosted
he must have roosted
we must have roosted
you must have roosted
they must have roosted	I must have been roosting
you must have been roosting
he must have been roosting
we must have been roosting
you must have been roosting
they must have been roosting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not roost
you must not roost
he must not roost
we must not roost
you must not roost
they must not roost 	I must not be roosting
you must not be roosting
he must not be roosting
we must not be roosting
you must not be roosting
they must not be roosting	I must not have roosted
you must not have roosted
he must not have roosted
we must not have roosted
you must not have roosted
they must not have roosted	I must not have been roosting
you must not have been roosting
he must not have been roosting
we must not have been roosting
you must not have been roosting
they must not have been roosting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I roost?
must you roost?
must he roost?
must we roost?
must you roost?
must they roost? 	must I be roosting?
must you be roosting?
must he be roosting?
must we be roosting?
must you be roosting?
must they be roosting? 	must I have roosted?
must you have roosted?
must he have roosted?
must we have roosted?
must you have roosted?
must they have roosted? 	must I have been roosting?
must you have been roosting?
must he have been roosting?
must we have been roosting?
must you have been roosting?
must they have been roosting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not roost?
must you not roost?
must he not roost?
must we not roost?
must you not roost?
must they not roost? 	must I not be roosting?
must you not be roosting?
must he not be roosting?
must we not be roosting?
must you not be roosting?
must they not be roosting? 	must I not have roosted?
must you not have roosted?
must he not have roosted?
must we not have roosted?
must you not have roosted?
must they not have roosted? 	must I not have been roosting?
must you not have been roosting?
must he not have been roosting?
must we not have been roosting?
must you not have been roosting?
must they not have been roosting?