could tax
Verbo regular: tax - taxed- taxed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could tax
you could tax
he could tax
we could tax
you could tax
they could tax 	I could be taxing
you could be taxing
he could be taxing
we could be taxing
you could be taxing
they could be taxing	I could have taxed
you could have taxed
he could have taxed
we could have taxed
you could have taxed
they could have taxed	I could have been taxing
you could have been taxing
he could have been taxing
we could have been taxing
you could have been taxing
they could have been taxing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't tax
you couldn't tax
he couldn't tax
we couldn't tax
you couldn't tax
they couldn't tax 	I couldn't be taxing
you couldn't be taxing
he couldn't be taxing
we couldn't be taxing
you couldn't be taxing
they couldn't be taxing	I couldn't have taxed
you couldn't have taxed
he couldn't have taxed
we couldn't have taxed
you couldn't have taxed
they couldn't have taxed	I couldn't have been taxing
you couldn't have been taxing
he couldn't have been taxing
we couldn't have been taxing
you couldn't have been taxing
they couldn't have been taxing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I tax?
could you tax?
could he tax?
could we tax?
could you tax?
could they tax? 	could I be taxing?
could you be taxing?
could he be taxing?
could we be taxing?
could you be taxing?
could they be taxing? 	could I have taxed?
could you have taxed?
could he have taxed?
could we have taxed?
could you have taxed?
could they have taxed? 	could I have been taxing?
could you have been taxing?
could he have been taxing?
could we have been taxing?
could you have been taxing?
could they have been taxing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I tax?
couldn't you tax?
couldn't he tax?
couldn't we tax?
couldn't you tax?
couldn't they tax? 	couldn't I be taxing?
couldn't you be taxing?
couldn't he be taxing?
couldn't we be taxing?
couldn't you be taxing?
couldn't they be taxing? 	couldn't I have taxed?
couldn't you have taxed?
couldn't he have taxed?
couldn't we have taxed?
couldn't you have taxed?
couldn't they have taxed? 	couldn't I have been taxing?
couldn't you have been taxing?
couldn't he have been taxing?
couldn't we have been taxing?
couldn't you have been taxing?
couldn't they have been taxing?