could tariff
Verbe régulier : tariff - tariffed- tariffed

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could tariff
you could tariff
she could tariff
we could tariff
you could tariff
they could tariff 	I could be tariffing
you could be tariffing
she could be tariffing
we could be tariffing
you could be tariffing
they could be tariffing	I could have tariffed
you could have tariffed
she could have tariffed
we could have tariffed
you could have tariffed
they could have tariffed	I could have been tariffing
you could have been tariffing
she could have been tariffing
we could have been tariffing
you could have been tariffing
they could have been tariffing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't tariff
you couldn't tariff
she couldn't tariff
we couldn't tariff
you couldn't tariff
they couldn't tariff 	I couldn't be tariffing
you couldn't be tariffing
she couldn't be tariffing
we couldn't be tariffing
you couldn't be tariffing
they couldn't be tariffing	I couldn't have tariffed
you couldn't have tariffed
she couldn't have tariffed
we couldn't have tariffed
you couldn't have tariffed
they couldn't have tariffed	I couldn't have been tariffing
you couldn't have been tariffing
she couldn't have been tariffing
we couldn't have been tariffing
you couldn't have been tariffing
they couldn't have been tariffing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I tariff?
could you tariff?
could she tariff?
could we tariff?
could you tariff?
could they tariff? 	could I be tariffing?
could you be tariffing?
could she be tariffing?
could we be tariffing?
could you be tariffing?
could they be tariffing? 	could I have tariffed?
could you have tariffed?
could she have tariffed?
could we have tariffed?
could you have tariffed?
could they have tariffed? 	could I have been tariffing?
could you have been tariffing?
could she have been tariffing?
could we have been tariffing?
could you have been tariffing?
could they have been tariffing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I tariff?
couldn't you tariff?
couldn't she tariff?
couldn't we tariff?
couldn't you tariff?
couldn't they tariff? 	couldn't I be tariffing?
couldn't you be tariffing?
couldn't she be tariffing?
couldn't we be tariffing?
couldn't you be tariffing?
couldn't they be tariffing? 	couldn't I have tariffed?
couldn't you have tariffed?
couldn't she have tariffed?
couldn't we have tariffed?
couldn't you have tariffed?
couldn't they have tariffed? 	couldn't I have been tariffing?
couldn't you have been tariffing?
couldn't she have been tariffing?
couldn't we have been tariffing?
couldn't you have been tariffing?
couldn't they have been tariffing?