could class
Verbo regular: class - classed- classed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could class
you could class
she could class
we could class
you could class
they could class 	I could be classing
you could be classing
she could be classing
we could be classing
you could be classing
they could be classing	I could have classed
you could have classed
she could have classed
we could have classed
you could have classed
they could have classed	I could have been classing
you could have been classing
she could have been classing
we could have been classing
you could have been classing
they could have been classing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't class
you couldn't class
she couldn't class
we couldn't class
you couldn't class
they couldn't class 	I couldn't be classing
you couldn't be classing
she couldn't be classing
we couldn't be classing
you couldn't be classing
they couldn't be classing	I couldn't have classed
you couldn't have classed
she couldn't have classed
we couldn't have classed
you couldn't have classed
they couldn't have classed	I couldn't have been classing
you couldn't have been classing
she couldn't have been classing
we couldn't have been classing
you couldn't have been classing
they couldn't have been classing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I class?
could you class?
could she class?
could we class?
could you class?
could they class? 	could I be classing?
could you be classing?
could she be classing?
could we be classing?
could you be classing?
could they be classing? 	could I have classed?
could you have classed?
could she have classed?
could we have classed?
could you have classed?
could they have classed? 	could I have been classing?
could you have been classing?
could she have been classing?
could we have been classing?
could you have been classing?
could they have been classing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I class?
couldn't you class?
couldn't she class?
couldn't we class?
couldn't you class?
couldn't they class? 	couldn't I be classing?
couldn't you be classing?
couldn't she be classing?
couldn't we be classing?
couldn't you be classing?
couldn't they be classing? 	couldn't I have classed?
couldn't you have classed?
couldn't she have classed?
couldn't we have classed?
couldn't you have classed?
couldn't they have classed? 	couldn't I have been classing?
couldn't you have been classing?
couldn't she have been classing?
couldn't we have been classing?
couldn't you have been classing?
couldn't they have been classing?