must extemporize
Verbo regular: extemporize - extemporized- extemporized

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must extemporize
you must extemporize
she must extemporize
we must extemporize
you must extemporize
they must extemporize 	I must be extemporizing
you must be extemporizing
she must be extemporizing
we must be extemporizing
you must be extemporizing
they must be extemporizing	I must have extemporized
you must have extemporized
she must have extemporized
we must have extemporized
you must have extemporized
they must have extemporized	I must have been extemporizing
you must have been extemporizing
she must have been extemporizing
we must have been extemporizing
you must have been extemporizing
they must have been extemporizing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not extemporize
you must not extemporize
she must not extemporize
we must not extemporize
you must not extemporize
they must not extemporize 	I must not be extemporizing
you must not be extemporizing
she must not be extemporizing
we must not be extemporizing
you must not be extemporizing
they must not be extemporizing	I must not have extemporized
you must not have extemporized
she must not have extemporized
we must not have extemporized
you must not have extemporized
they must not have extemporized	I must not have been extemporizing
you must not have been extemporizing
she must not have been extemporizing
we must not have been extemporizing
you must not have been extemporizing
they must not have been extemporizing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I extemporize?
must you extemporize?
must she extemporize?
must we extemporize?
must you extemporize?
must they extemporize? 	must I be extemporizing?
must you be extemporizing?
must she be extemporizing?
must we be extemporizing?
must you be extemporizing?
must they be extemporizing? 	must I have extemporized?
must you have extemporized?
must she have extemporized?
must we have extemporized?
must you have extemporized?
must they have extemporized? 	must I have been extemporizing?
must you have been extemporizing?
must she have been extemporizing?
must we have been extemporizing?
must you have been extemporizing?
must they have been extemporizing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not extemporize?
must you not extemporize?
must she not extemporize?
must we not extemporize?
must you not extemporize?
must they not extemporize? 	must I not be extemporizing?
must you not be extemporizing?
must she not be extemporizing?
must we not be extemporizing?
must you not be extemporizing?
must they not be extemporizing? 	must I not have extemporized?
must you not have extemporized?
must she not have extemporized?
must we not have extemporized?
must you not have extemporized?
must they not have extemporized? 	must I not have been extemporizing?
must you not have been extemporizing?
must she not have been extemporizing?
must we not have been extemporizing?
must you not have been extemporizing?
must they not have been extemporizing?