must twitter
Verbo regular: twitter - twittered- twittered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must twitter
you must twitter
he must twitter
we must twitter
you must twitter
they must twitter 	I must be twittering
you must be twittering
he must be twittering
we must be twittering
you must be twittering
they must be twittering	I must have twittered
you must have twittered
he must have twittered
we must have twittered
you must have twittered
they must have twittered	I must have been twittering
you must have been twittering
he must have been twittering
we must have been twittering
you must have been twittering
they must have been twittering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not twitter
you must not twitter
he must not twitter
we must not twitter
you must not twitter
they must not twitter 	I must not be twittering
you must not be twittering
he must not be twittering
we must not be twittering
you must not be twittering
they must not be twittering	I must not have twittered
you must not have twittered
he must not have twittered
we must not have twittered
you must not have twittered
they must not have twittered	I must not have been twittering
you must not have been twittering
he must not have been twittering
we must not have been twittering
you must not have been twittering
they must not have been twittering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I twitter?
must you twitter?
must he twitter?
must we twitter?
must you twitter?
must they twitter? 	must I be twittering?
must you be twittering?
must he be twittering?
must we be twittering?
must you be twittering?
must they be twittering? 	must I have twittered?
must you have twittered?
must he have twittered?
must we have twittered?
must you have twittered?
must they have twittered? 	must I have been twittering?
must you have been twittering?
must he have been twittering?
must we have been twittering?
must you have been twittering?
must they have been twittering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not twitter?
must you not twitter?
must he not twitter?
must we not twitter?
must you not twitter?
must they not twitter? 	must I not be twittering?
must you not be twittering?
must he not be twittering?
must we not be twittering?
must you not be twittering?
must they not be twittering? 	must I not have twittered?
must you not have twittered?
must he not have twittered?
must we not have twittered?
must you not have twittered?
must they not have twittered? 	must I not have been twittering?
must you not have been twittering?
must he not have been twittering?
must we not have been twittering?
must you not have been twittering?
must they not have been twittering?