must ad-lib
Verbo regular: ad-lib - ad-libed- ad-libed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must ad-lib
you must ad-lib
he must ad-lib
we must ad-lib
you must ad-lib
they must ad-lib 	I must be ad-libing
you must be ad-libing
he must be ad-libing
we must be ad-libing
you must be ad-libing
they must be ad-libing	I must have ad-libed
you must have ad-libed
he must have ad-libed
we must have ad-libed
you must have ad-libed
they must have ad-libed	I must have been ad-libing
you must have been ad-libing
he must have been ad-libing
we must have been ad-libing
you must have been ad-libing
they must have been ad-libing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't ad-lib
you mustn't ad-lib
he mustn't ad-lib
we mustn't ad-lib
you mustn't ad-lib
they mustn't ad-lib 	I mustn't be ad-libing
you mustn't be ad-libing
he mustn't be ad-libing
we mustn't be ad-libing
you mustn't be ad-libing
they mustn't be ad-libing	I mustn't have ad-libed
you mustn't have ad-libed
he mustn't have ad-libed
we mustn't have ad-libed
you mustn't have ad-libed
they mustn't have ad-libed	I mustn't have been ad-libing
you mustn't have been ad-libing
he mustn't have been ad-libing
we mustn't have been ad-libing
you mustn't have been ad-libing
they mustn't have been ad-libing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I ad-lib?
must you ad-lib?
must he ad-lib?
must we ad-lib?
must you ad-lib?
must they ad-lib? 	must I be ad-libing?
must you be ad-libing?
must he be ad-libing?
must we be ad-libing?
must you be ad-libing?
must they be ad-libing? 	must I have ad-libed?
must you have ad-libed?
must he have ad-libed?
must we have ad-libed?
must you have ad-libed?
must they have ad-libed? 	must I have been ad-libing?
must you have been ad-libing?
must he have been ad-libing?
must we have been ad-libing?
must you have been ad-libing?
must they have been ad-libing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I ad-lib?
mustn't you ad-lib?
mustn't he ad-lib?
mustn't we ad-lib?
mustn't you ad-lib?
mustn't they ad-lib? 	mustn't I be ad-libing?
mustn't you be ad-libing?
mustn't he be ad-libing?
mustn't we be ad-libing?
mustn't you be ad-libing?
mustn't they be ad-libing? 	mustn't I have ad-libed?
mustn't you have ad-libed?
mustn't he have ad-libed?
mustn't we have ad-libed?
mustn't you have ad-libed?
mustn't they have ad-libed? 	mustn't I have been ad-libing?
mustn't you have been ad-libing?
mustn't he have been ad-libing?
mustn't we have been ad-libing?
mustn't you have been ad-libing?
mustn't they have been ad-libing?