can tariff
Verbo regular: tariff - tariffed- tariffed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con 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	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't tariff
you can't tariff
he can't tariff
we can't tariff
you can't tariff
they can't tariff 	I can't be tariffing
you can't be tariffing
he can't be tariffing
we can't be tariffing
you can't be tariffing
they can't be tariffing	I can't have tariffed
you can't have tariffed
he can't have tariffed
we can't have tariffed
you can't have tariffed
they can't have tariffed	I can't have been tariffing
you can't have been tariffing
he can't have been tariffing
we can't have been tariffing
you can't have been tariffing
they can't have been tariffing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con 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-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can't I tariff?
can't you tariff?
can't he tariff?
can't we tariff?
can't you tariff?
can't they tariff? 	can't I be tariffing?
can't you be tariffing?
can't he be tariffing?
can't we be tariffing?
can't you be tariffing?
can't they be tariffing? 	can't I have tariffed?
can't you have tariffed?
can't he have tariffed?
can't we have tariffed?
can't you have tariffed?
can't they have tariffed? 	can't I have been tariffing?
can't you have been tariffing?
can't he have been tariffing?
can't we have been tariffing?
can't you have been tariffing?
can't they have been tariffing?