must upholster
Verbo regular: upholster - upholstered- upholstered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must upholster
you must upholster
she must upholster
we must upholster
you must upholster
they must upholster 	I must be upholstering
you must be upholstering
she must be upholstering
we must be upholstering
you must be upholstering
they must be upholstering	I must have upholstered
you must have upholstered
she must have upholstered
we must have upholstered
you must have upholstered
they must have upholstered	I must have been upholstering
you must have been upholstering
she must have been upholstering
we must have been upholstering
you must have been upholstering
they must have been upholstering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not upholster
you must not upholster
she must not upholster
we must not upholster
you must not upholster
they must not upholster 	I must not be upholstering
you must not be upholstering
she must not be upholstering
we must not be upholstering
you must not be upholstering
they must not be upholstering	I must not have upholstered
you must not have upholstered
she must not have upholstered
we must not have upholstered
you must not have upholstered
they must not have upholstered	I must not have been upholstering
you must not have been upholstering
she must not have been upholstering
we must not have been upholstering
you must not have been upholstering
they must not have been upholstering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I upholster?
must you upholster?
must she upholster?
must we upholster?
must you upholster?
must they upholster? 	must I be upholstering?
must you be upholstering?
must she be upholstering?
must we be upholstering?
must you be upholstering?
must they be upholstering? 	must I have upholstered?
must you have upholstered?
must she have upholstered?
must we have upholstered?
must you have upholstered?
must they have upholstered? 	must I have been upholstering?
must you have been upholstering?
must she have been upholstering?
must we have been upholstering?
must you have been upholstering?
must they have been upholstering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not upholster?
must you not upholster?
must she not upholster?
must we not upholster?
must you not upholster?
must they not upholster? 	must I not be upholstering?
must you not be upholstering?
must she not be upholstering?
must we not be upholstering?
must you not be upholstering?
must they not be upholstering? 	must I not have upholstered?
must you not have upholstered?
must she not have upholstered?
must we not have upholstered?
must you not have upholstered?
must they not have upholstered? 	must I not have been upholstering?
must you not have been upholstering?
must she not have been upholstering?
must we not have been upholstering?
must you not have been upholstering?
must they not have been upholstering?