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

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must ad-lib
you must ad-lib
she 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
she 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
she 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
she must have been ad-libing
we must have been ad-libing
you must have been ad-libing
they must have been ad-libing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not ad-lib
you must not ad-lib
she must not ad-lib
we must not ad-lib
you must not ad-lib
they must not ad-lib 	I must not be ad-libing
you must not be ad-libing
she must not be ad-libing
we must not be ad-libing
you must not be ad-libing
they must not be ad-libing	I must not have ad-libed
you must not have ad-libed
she must not have ad-libed
we must not have ad-libed
you must not have ad-libed
they must not have ad-libed	I must not have been ad-libing
you must not have been ad-libing
she must not have been ad-libing
we must not have been ad-libing
you must not have been ad-libing
they must not have been ad-libing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I ad-lib?
must you ad-lib?
must she 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 she 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 she 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 she have been ad-libing?
must we have been ad-libing?
must you have been ad-libing?
must they have been ad-libing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not ad-lib?
must you not ad-lib?
must she not ad-lib?
must we not ad-lib?
must you not ad-lib?
must they not ad-lib? 	must I not be ad-libing?
must you not be ad-libing?
must she not be ad-libing?
must we not be ad-libing?
must you not be ad-libing?
must they not be ad-libing? 	must I not have ad-libed?
must you not have ad-libed?
must she not have ad-libed?
must we not have ad-libed?
must you not have ad-libed?
must they not have ad-libed? 	must I not have been ad-libing?
must you not have been ad-libing?
must she not have been ad-libing?
must we not have been ad-libing?
must you not have been ad-libing?
must they not have been ad-libing?