could extemporize
Verbo regular: extemporize - extemporized- extemporized

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could extemporize
you could extemporize
he could extemporize
we could extemporize
you could extemporize
they could extemporize 	I could be extemporizing
you could be extemporizing
he could be extemporizing
we could be extemporizing
you could be extemporizing
they could be extemporizing	I could have extemporized
you could have extemporized
he could have extemporized
we could have extemporized
you could have extemporized
they could have extemporized	I could have been extemporizing
you could have been extemporizing
he could have been extemporizing
we could have been extemporizing
you could have been extemporizing
they could have been extemporizing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not extemporize
you could not extemporize
he could not extemporize
we could not extemporize
you could not extemporize
they could not extemporize 	I could not be extemporizing
you could not be extemporizing
he could not be extemporizing
we could not be extemporizing
you could not be extemporizing
they could not be extemporizing	I could not have extemporized
you could not have extemporized
he could not have extemporized
we could not have extemporized
you could not have extemporized
they could not have extemporized	I could not have been extemporizing
you could not have been extemporizing
he could not have been extemporizing
we could not have been extemporizing
you could not have been extemporizing
they could not have been extemporizing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I extemporize?
could you extemporize?
could he extemporize?
could we extemporize?
could you extemporize?
could they extemporize? 	could I be extemporizing?
could you be extemporizing?
could he be extemporizing?
could we be extemporizing?
could you be extemporizing?
could they be extemporizing? 	could I have extemporized?
could you have extemporized?
could he have extemporized?
could we have extemporized?
could you have extemporized?
could they have extemporized? 	could I have been extemporizing?
could you have been extemporizing?
could he have been extemporizing?
could we have been extemporizing?
could you have been extemporizing?
could they have been extemporizing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not extemporize?
could you not extemporize?
could he not extemporize?
could we not extemporize?
could you not extemporize?
could they not extemporize? 	could I not be extemporizing?
could you not be extemporizing?
could he not be extemporizing?
could we not be extemporizing?
could you not be extemporizing?
could they not be extemporizing? 	could I not have extemporized?
could you not have extemporized?
could he not have extemporized?
could we not have extemporized?
could you not have extemporized?
could they not have extemporized? 	could I not have been extemporizing?
could you not have been extemporizing?
could he not have been extemporizing?
could we not have been extemporizing?
could you not have been extemporizing?
could they not have been extemporizing?