should exchange
Verbo regular: exchange - exchanged- exchanged

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should exchange
you should exchange
he should exchange
we should exchange
you should exchange
they should exchange 	I should be exchanging
you should be exchanging
he should be exchanging
we should be exchanging
you should be exchanging
they should be exchanging	I should have exchanged
you should have exchanged
he should have exchanged
we should have exchanged
you should have exchanged
they should have exchanged	I should have been exchanging
you should have been exchanging
he should have been exchanging
we should have been exchanging
you should have been exchanging
they should have been exchanging	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should not exchange
you should not exchange
he should not exchange
we should not exchange
you should not exchange
they should not exchange 	I should not be exchanging
you should not be exchanging
he should not be exchanging
we should not be exchanging
you should not be exchanging
they should not be exchanging	I should not have exchanged
you should not have exchanged
he should not have exchanged
we should not have exchanged
you should not have exchanged
they should not have exchanged	I should not have been exchanging
you should not have been exchanging
he should not have been exchanging
we should not have been exchanging
you should not have been exchanging
they should not have been exchanging	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I exchange?
should you exchange?
should he exchange?
should we exchange?
should you exchange?
should they exchange? 	should I be exchanging?
should you be exchanging?
should he be exchanging?
should we be exchanging?
should you be exchanging?
should they be exchanging? 	should I have exchanged?
should you have exchanged?
should he have exchanged?
should we have exchanged?
should you have exchanged?
should they have exchanged? 	should I have been exchanging?
should you have been exchanging?
should he have been exchanging?
should we have been exchanging?
should you have been exchanging?
should they have been exchanging? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I not exchange?
should you not exchange?
should he not exchange?
should we not exchange?
should you not exchange?
should they not exchange? 	should I not be exchanging?
should you not be exchanging?
should he not be exchanging?
should we not be exchanging?
should you not be exchanging?
should they not be exchanging? 	should I not have exchanged?
should you not have exchanged?
should he not have exchanged?
should we not have exchanged?
should you not have exchanged?
should they not have exchanged? 	should I not have been exchanging?
should you not have been exchanging?
should he not have been exchanging?
should we not have been exchanging?
should you not have been exchanging?
should they not have been exchanging?