should prolong
Verbo regular: prolong - prolonged- prolonged

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should prolong
you should prolong
he should prolong
we should prolong
you should prolong
they should prolong 	I should be prolonging
you should be prolonging
he should be prolonging
we should be prolonging
you should be prolonging
they should be prolonging	I should have prolonged
you should have prolonged
he should have prolonged
we should have prolonged
you should have prolonged
they should have prolonged	I should have been prolonging
you should have been prolonging
he should have been prolonging
we should have been prolonging
you should have been prolonging
they should have been prolonging	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should not prolong
you should not prolong
he should not prolong
we should not prolong
you should not prolong
they should not prolong 	I should not be prolonging
you should not be prolonging
he should not be prolonging
we should not be prolonging
you should not be prolonging
they should not be prolonging	I should not have prolonged
you should not have prolonged
he should not have prolonged
we should not have prolonged
you should not have prolonged
they should not have prolonged	I should not have been prolonging
you should not have been prolonging
he should not have been prolonging
we should not have been prolonging
you should not have been prolonging
they should not have been prolonging	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I prolong?
should you prolong?
should he prolong?
should we prolong?
should you prolong?
should they prolong? 	should I be prolonging?
should you be prolonging?
should he be prolonging?
should we be prolonging?
should you be prolonging?
should they be prolonging? 	should I have prolonged?
should you have prolonged?
should he have prolonged?
should we have prolonged?
should you have prolonged?
should they have prolonged? 	should I have been prolonging?
should you have been prolonging?
should he have been prolonging?
should we have been prolonging?
should you have been prolonging?
should they have been prolonging? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I not prolong?
should you not prolong?
should he not prolong?
should we not prolong?
should you not prolong?
should they not prolong? 	should I not be prolonging?
should you not be prolonging?
should he not be prolonging?
should we not be prolonging?
should you not be prolonging?
should they not be prolonging? 	should I not have prolonged?
should you not have prolonged?
should he not have prolonged?
should we not have prolonged?
should you not have prolonged?
should they not have prolonged? 	should I not have been prolonging?
should you not have been prolonging?
should he not have been prolonging?
should we not have been prolonging?
should you not have been prolonging?
should they not have been prolonging?