can improve
Verbo regular: improve - improved- improved

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can improve
you can improve
she can improve
we can improve
you can improve
they can improve 	I can be improving
you can be improving
she can be improving
we can be improving
you can be improving
they can be improving	I can have improved
you can have improved
she can have improved
we can have improved
you can have improved
they can have improved	I can have been improving
you can have been improving
she can have been improving
we can have been improving
you can have been improving
they can have been improving	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't improve
you can't improve
she can't improve
we can't improve
you can't improve
they can't improve 	I can't be improving
you can't be improving
she can't be improving
we can't be improving
you can't be improving
they can't be improving	I can't have improved
you can't have improved
she can't have improved
we can't have improved
you can't have improved
they can't have improved	I can't have been improving
you can't have been improving
she can't have been improving
we can't have been improving
you can't have been improving
they can't have been improving	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I improve?
can you improve?
can she improve?
can we improve?
can you improve?
can they improve? 	can I be improving?
can you be improving?
can she be improving?
can we be improving?
can you be improving?
can they be improving? 	can I have improved?
can you have improved?
can she have improved?
can we have improved?
can you have improved?
can they have improved? 	can I have been improving?
can you have been improving?
can she have been improving?
can we have been improving?
can you have been improving?
can they have been improving? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can't I improve?
can't you improve?
can't she improve?
can't we improve?
can't you improve?
can't they improve? 	can't I be improving?
can't you be improving?
can't she be improving?
can't we be improving?
can't you be improving?
can't they be improving? 	can't I have improved?
can't you have improved?
can't she have improved?
can't we have improved?
can't you have improved?
can't they have improved? 	can't I have been improving?
can't you have been improving?
can't she have been improving?
can't we have been improving?
can't you have been improving?
can't they have been improving?