must comment
Verbo regular: comment - commented- commented

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must comment
you must comment
he must comment
we must comment
you must comment
they must comment 	I must be commenting
you must be commenting
he must be commenting
we must be commenting
you must be commenting
they must be commenting	I must have commented
you must have commented
he must have commented
we must have commented
you must have commented
they must have commented	I must have been commenting
you must have been commenting
he must have been commenting
we must have been commenting
you must have been commenting
they must have been commenting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't comment
you mustn't comment
he mustn't comment
we mustn't comment
you mustn't comment
they mustn't comment 	I mustn't be commenting
you mustn't be commenting
he mustn't be commenting
we mustn't be commenting
you mustn't be commenting
they mustn't be commenting	I mustn't have commented
you mustn't have commented
he mustn't have commented
we mustn't have commented
you mustn't have commented
they mustn't have commented	I mustn't have been commenting
you mustn't have been commenting
he mustn't have been commenting
we mustn't have been commenting
you mustn't have been commenting
they mustn't have been commenting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I comment?
must you comment?
must he comment?
must we comment?
must you comment?
must they comment? 	must I be commenting?
must you be commenting?
must he be commenting?
must we be commenting?
must you be commenting?
must they be commenting? 	must I have commented?
must you have commented?
must he have commented?
must we have commented?
must you have commented?
must they have commented? 	must I have been commenting?
must you have been commenting?
must he have been commenting?
must we have been commenting?
must you have been commenting?
must they have been commenting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I comment?
mustn't you comment?
mustn't he comment?
mustn't we comment?
mustn't you comment?
mustn't they comment? 	mustn't I be commenting?
mustn't you be commenting?
mustn't he be commenting?
mustn't we be commenting?
mustn't you be commenting?
mustn't they be commenting? 	mustn't I have commented?
mustn't you have commented?
mustn't he have commented?
mustn't we have commented?
mustn't you have commented?
mustn't they have commented? 	mustn't I have been commenting?
mustn't you have been commenting?
mustn't he have been commenting?
mustn't we have been commenting?
mustn't you have been commenting?
mustn't they have been commenting?