must furl
Verbo regular: furl - furled- furled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must furl
you must furl
he must furl
we must furl
you must furl
they must furl 	I must be furling
you must be furling
he must be furling
we must be furling
you must be furling
they must be furling	I must have furled
you must have furled
he must have furled
we must have furled
you must have furled
they must have furled	I must have been furling
you must have been furling
he must have been furling
we must have been furling
you must have been furling
they must have been furling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't furl
you mustn't furl
he mustn't furl
we mustn't furl
you mustn't furl
they mustn't furl 	I mustn't be furling
you mustn't be furling
he mustn't be furling
we mustn't be furling
you mustn't be furling
they mustn't be furling	I mustn't have furled
you mustn't have furled
he mustn't have furled
we mustn't have furled
you mustn't have furled
they mustn't have furled	I mustn't have been furling
you mustn't have been furling
he mustn't have been furling
we mustn't have been furling
you mustn't have been furling
they mustn't have been furling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I furl?
must you furl?
must he furl?
must we furl?
must you furl?
must they furl? 	must I be furling?
must you be furling?
must he be furling?
must we be furling?
must you be furling?
must they be furling? 	must I have furled?
must you have furled?
must he have furled?
must we have furled?
must you have furled?
must they have furled? 	must I have been furling?
must you have been furling?
must he have been furling?
must we have been furling?
must you have been furling?
must they have been furling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I furl?
mustn't you furl?
mustn't he furl?
mustn't we furl?
mustn't you furl?
mustn't they furl? 	mustn't I be furling?
mustn't you be furling?
mustn't he be furling?
mustn't we be furling?
mustn't you be furling?
mustn't they be furling? 	mustn't I have furled?
mustn't you have furled?
mustn't he have furled?
mustn't we have furled?
mustn't you have furled?
mustn't they have furled? 	mustn't I have been furling?
mustn't you have been furling?
mustn't he have been furling?
mustn't we have been furling?
mustn't you have been furling?
mustn't they have been furling?