must single
Verbo regular: single - singled- singled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must single
you must single
he must single
we must single
you must single
they must single 	I must be singling
you must be singling
he must be singling
we must be singling
you must be singling
they must be singling	I must have singled
you must have singled
he must have singled
we must have singled
you must have singled
they must have singled	I must have been singling
you must have been singling
he must have been singling
we must have been singling
you must have been singling
they must have been singling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't single
you mustn't single
he mustn't single
we mustn't single
you mustn't single
they mustn't single 	I mustn't be singling
you mustn't be singling
he mustn't be singling
we mustn't be singling
you mustn't be singling
they mustn't be singling	I mustn't have singled
you mustn't have singled
he mustn't have singled
we mustn't have singled
you mustn't have singled
they mustn't have singled	I mustn't have been singling
you mustn't have been singling
he mustn't have been singling
we mustn't have been singling
you mustn't have been singling
they mustn't have been singling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I single?
must you single?
must he single?
must we single?
must you single?
must they single? 	must I be singling?
must you be singling?
must he be singling?
must we be singling?
must you be singling?
must they be singling? 	must I have singled?
must you have singled?
must he have singled?
must we have singled?
must you have singled?
must they have singled? 	must I have been singling?
must you have been singling?
must he have been singling?
must we have been singling?
must you have been singling?
must they have been singling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I single?
mustn't you single?
mustn't he single?
mustn't we single?
mustn't you single?
mustn't they single? 	mustn't I be singling?
mustn't you be singling?
mustn't he be singling?
mustn't we be singling?
mustn't you be singling?
mustn't they be singling? 	mustn't I have singled?
mustn't you have singled?
mustn't he have singled?
mustn't we have singled?
mustn't you have singled?
mustn't they have singled? 	mustn't I have been singling?
mustn't you have been singling?
mustn't he have been singling?
mustn't we have been singling?
mustn't you have been singling?
mustn't they have been singling?