must furnish
Verbo regular: furnish - furnished- furnished

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must furnish
you must furnish
he must furnish
we must furnish
you must furnish
they must furnish 	I must be furnishing
you must be furnishing
he must be furnishing
we must be furnishing
you must be furnishing
they must be furnishing	I must have furnished
you must have furnished
he must have furnished
we must have furnished
you must have furnished
they must have furnished	I must have been furnishing
you must have been furnishing
he must have been furnishing
we must have been furnishing
you must have been furnishing
they must have been furnishing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not furnish
you must not furnish
he must not furnish
we must not furnish
you must not furnish
they must not furnish 	I must not be furnishing
you must not be furnishing
he must not be furnishing
we must not be furnishing
you must not be furnishing
they must not be furnishing	I must not have furnished
you must not have furnished
he must not have furnished
we must not have furnished
you must not have furnished
they must not have furnished	I must not have been furnishing
you must not have been furnishing
he must not have been furnishing
we must not have been furnishing
you must not have been furnishing
they must not have been furnishing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I furnish?
must you furnish?
must he furnish?
must we furnish?
must you furnish?
must they furnish? 	must I be furnishing?
must you be furnishing?
must he be furnishing?
must we be furnishing?
must you be furnishing?
must they be furnishing? 	must I have furnished?
must you have furnished?
must he have furnished?
must we have furnished?
must you have furnished?
must they have furnished? 	must I have been furnishing?
must you have been furnishing?
must he have been furnishing?
must we have been furnishing?
must you have been furnishing?
must they have been furnishing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not furnish?
must you not furnish?
must he not furnish?
must we not furnish?
must you not furnish?
must they not furnish? 	must I not be furnishing?
must you not be furnishing?
must he not be furnishing?
must we not be furnishing?
must you not be furnishing?
must they not be furnishing? 	must I not have furnished?
must you not have furnished?
must he not have furnished?
must we not have furnished?
must you not have furnished?
must they not have furnished? 	must I not have been furnishing?
must you not have been furnishing?
must he not have been furnishing?
must we not have been furnishing?
must you not have been furnishing?
must they not have been furnishing?