must appreciate
Verbo regular: appreciate - appreciated- appreciated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must appreciate
you must appreciate
she must appreciate
we must appreciate
you must appreciate
they must appreciate 	I must be appreciating
you must be appreciating
she must be appreciating
we must be appreciating
you must be appreciating
they must be appreciating	I must have appreciated
you must have appreciated
she must have appreciated
we must have appreciated
you must have appreciated
they must have appreciated	I must have been appreciating
you must have been appreciating
she must have been appreciating
we must have been appreciating
you must have been appreciating
they must have been appreciating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't appreciate
you mustn't appreciate
she mustn't appreciate
we mustn't appreciate
you mustn't appreciate
they mustn't appreciate 	I mustn't be appreciating
you mustn't be appreciating
she mustn't be appreciating
we mustn't be appreciating
you mustn't be appreciating
they mustn't be appreciating	I mustn't have appreciated
you mustn't have appreciated
she mustn't have appreciated
we mustn't have appreciated
you mustn't have appreciated
they mustn't have appreciated	I mustn't have been appreciating
you mustn't have been appreciating
she mustn't have been appreciating
we mustn't have been appreciating
you mustn't have been appreciating
they mustn't have been appreciating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I appreciate?
must you appreciate?
must she appreciate?
must we appreciate?
must you appreciate?
must they appreciate? 	must I be appreciating?
must you be appreciating?
must she be appreciating?
must we be appreciating?
must you be appreciating?
must they be appreciating? 	must I have appreciated?
must you have appreciated?
must she have appreciated?
must we have appreciated?
must you have appreciated?
must they have appreciated? 	must I have been appreciating?
must you have been appreciating?
must she have been appreciating?
must we have been appreciating?
must you have been appreciating?
must they have been appreciating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I appreciate?
mustn't you appreciate?
mustn't she appreciate?
mustn't we appreciate?
mustn't you appreciate?
mustn't they appreciate? 	mustn't I be appreciating?
mustn't you be appreciating?
mustn't she be appreciating?
mustn't we be appreciating?
mustn't you be appreciating?
mustn't they be appreciating? 	mustn't I have appreciated?
mustn't you have appreciated?
mustn't she have appreciated?
mustn't we have appreciated?
mustn't you have appreciated?
mustn't they have appreciated? 	mustn't I have been appreciating?
mustn't you have been appreciating?
mustn't she have been appreciating?
mustn't we have been appreciating?
mustn't you have been appreciating?
mustn't they have been appreciating?