could improvise
Verbo regular: improvise - improvised- improvised

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could improvise
you could improvise
he could improvise
we could improvise
you could improvise
they could improvise 	I could be improvising
you could be improvising
he could be improvising
we could be improvising
you could be improvising
they could be improvising	I could have improvised
you could have improvised
he could have improvised
we could have improvised
you could have improvised
they could have improvised	I could have been improvising
you could have been improvising
he could have been improvising
we could have been improvising
you could have been improvising
they could have been improvising	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not improvise
you could not improvise
he could not improvise
we could not improvise
you could not improvise
they could not improvise 	I could not be improvising
you could not be improvising
he could not be improvising
we could not be improvising
you could not be improvising
they could not be improvising	I could not have improvised
you could not have improvised
he could not have improvised
we could not have improvised
you could not have improvised
they could not have improvised	I could not have been improvising
you could not have been improvising
he could not have been improvising
we could not have been improvising
you could not have been improvising
they could not have been improvising	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I improvise?
could you improvise?
could he improvise?
could we improvise?
could you improvise?
could they improvise? 	could I be improvising?
could you be improvising?
could he be improvising?
could we be improvising?
could you be improvising?
could they be improvising? 	could I have improvised?
could you have improvised?
could he have improvised?
could we have improvised?
could you have improvised?
could they have improvised? 	could I have been improvising?
could you have been improvising?
could he have been improvising?
could we have been improvising?
could you have been improvising?
could they have been improvising? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not improvise?
could you not improvise?
could he not improvise?
could we not improvise?
could you not improvise?
could they not improvise? 	could I not be improvising?
could you not be improvising?
could he not be improvising?
could we not be improvising?
could you not be improvising?
could they not be improvising? 	could I not have improvised?
could you not have improvised?
could he not have improvised?
could we not have improvised?
could you not have improvised?
could they not have improvised? 	could I not have been improvising?
could you not have been improvising?
could he not have been improvising?
could we not have been improvising?
could you not have been improvising?
could they not have been improvising?