I can exchange you can exchange she can exchange we can exchange you can exchange they can exchange
Forma com V-ing
I can be exchanging you can be exchanging she can be exchanging we can be exchanging you can be exchanging they can be exchanging
Perfeito
I can have exchanged you can have exchanged she can have exchanged we can have exchanged you can have exchanged they can have exchanged
Perfeito com V-ing
I can have been exchanging you can have been exchanging she can have been exchanging we can have been exchanging you can have been exchanging they can have been exchanging
Negação
Forma simple
I can't exchange you can't exchange she can't exchange we can't exchange you can't exchange they can't exchange
Forma com V-ing
I can't be exchanging you can't be exchanging she can't be exchanging we can't be exchanging you can't be exchanging they can't be exchanging
Perfeito
I can't have exchanged you can't have exchanged she can't have exchanged we can't have exchanged you can't have exchanged they can't have exchanged
Perfeito com V-ing
I can't have been exchanging you can't have been exchanging she can't have been exchanging we can't have been exchanging you can't have been exchanging they can't have been exchanging
Forma interrogativa
Forma simple
can I exchange? can you exchange? can she exchange? can we exchange? can you exchange? can they exchange?
Forma com V-ing
can I be exchanging? can you be exchanging? can she be exchanging? can we be exchanging? can you be exchanging? can they be exchanging?
Perfeito
can I have exchanged? can you have exchanged? can she have exchanged? can we have exchanged? can you have exchanged? can they have exchanged?
Perfeito com V-ing
can I have been exchanging? can you have been exchanging? can she have been exchanging? can we have been exchanging? can you have been exchanging? can they have been exchanging?
Forma interro-Negação
Forma simple
can't I exchange? can't you exchange? can't she exchange? can't we exchange? can't you exchange? can't they exchange?
Forma com V-ing
can't I be exchanging? can't you be exchanging? can't she be exchanging? can't we be exchanging? can't you be exchanging? can't they be exchanging?
Perfeito
can't I have exchanged? can't you have exchanged? can't she have exchanged? can't we have exchanged? can't you have exchanged? can't they have exchanged?
Perfeito com V-ing
can't I have been exchanging? can't you have been exchanging? can't she have been exchanging? can't we have been exchanging? can't you have been exchanging? can't they have been exchanging?