could improvise
Verbe régulier : improvise - improvised- improvised
Traduction française : improviser 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could improvise
you could improvise
she could improvise
we could improvise
you could improvise
they could improvise 	I could be improvising
you could be improvising
she could be improvising
we could be improvising
you could be improvising
they could be improvising	I could have improvised
you could have improvised
she 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
she could have been improvising
we could have been improvising
you could have been improvising
they could have been improvising	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't improvise
you couldn't improvise
she couldn't improvise
we couldn't improvise
you couldn't improvise
they couldn't improvise 	I couldn't be improvising
you couldn't be improvising
she couldn't be improvising
we couldn't be improvising
you couldn't be improvising
they couldn't be improvising	I couldn't have improvised
you couldn't have improvised
she couldn't have improvised
we couldn't have improvised
you couldn't have improvised
they couldn't have improvised	I couldn't have been improvising
you couldn't have been improvising
she couldn't have been improvising
we couldn't have been improvising
you couldn't have been improvising
they couldn't have been improvising	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I improvise?
could you improvise?
could she improvise?
could we improvise?
could you improvise?
could they improvise? 	could I be improvising?
could you be improvising?
could she be improvising?
could we be improvising?
could you be improvising?
could they be improvising? 	could I have improvised?
could you have improvised?
could she 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 she have been improvising?
could we have been improvising?
could you have been improvising?
could they have been improvising? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I improvise?
couldn't you improvise?
couldn't she improvise?
couldn't we improvise?
couldn't you improvise?
couldn't they improvise? 	couldn't I be improvising?
couldn't you be improvising?
couldn't she be improvising?
couldn't we be improvising?
couldn't you be improvising?
couldn't they be improvising? 	couldn't I have improvised?
couldn't you have improvised?
couldn't she have improvised?
couldn't we have improvised?
couldn't you have improvised?
couldn't they have improvised? 	couldn't I have been improvising?
couldn't you have been improvising?
couldn't she have been improvising?
couldn't we have been improvising?
couldn't you have been improvising?
couldn't they have been improvising?