can tariff
Verbo regular: tariff - tariffed- tariffed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can tariff
you can tariff
he can tariff
we can tariff
you can tariff
they can tariff 	I can be tariffing
you can be tariffing
he can be tariffing
we can be tariffing
you can be tariffing
they can be tariffing	I can have tariffed
you can have tariffed
he can have tariffed
we can have tariffed
you can have tariffed
they can have tariffed	I can have been tariffing
you can have been tariffing
he can have been tariffing
we can have been tariffing
you can have been tariffing
they can have been tariffing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot tariff
you cannot tariff
he cannot tariff
we cannot tariff
you cannot tariff
they cannot tariff 	I cannot be tariffing
you cannot be tariffing
he cannot be tariffing
we cannot be tariffing
you cannot be tariffing
they cannot be tariffing	I cannot have tariffed
you cannot have tariffed
he cannot have tariffed
we cannot have tariffed
you cannot have tariffed
they cannot have tariffed	I cannot have been tariffing
you cannot have been tariffing
he cannot have been tariffing
we cannot have been tariffing
you cannot have been tariffing
they cannot have been tariffing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I tariff?
can you tariff?
can he tariff?
can we tariff?
can you tariff?
can they tariff? 	can I be tariffing?
can you be tariffing?
can he be tariffing?
can we be tariffing?
can you be tariffing?
can they be tariffing? 	can I have tariffed?
can you have tariffed?
can he have tariffed?
can we have tariffed?
can you have tariffed?
can they have tariffed? 	can I have been tariffing?
can you have been tariffing?
can he have been tariffing?
can we have been tariffing?
can you have been tariffing?
can they have been tariffing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not tariff?
can you not tariff?
can he not tariff?
can we not tariff?
can you not tariff?
can they not tariff? 	can I not be tariffing?
can you not be tariffing?
can he not be tariffing?
can we not be tariffing?
can you not be tariffing?
can they not be tariffing? 	can I not have tariffed?
can you not have tariffed?
can he not have tariffed?
can we not have tariffed?
can you not have tariffed?
can they not have tariffed? 	can I not have been tariffing?
can you not have been tariffing?
can he not have been tariffing?
can we not have been tariffing?
can you not have been tariffing?
can they not have been tariffing?