could comb
Verbo regular: comb - combed- combed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could comb
you could comb
he could comb
we could comb
you could comb
they could comb 	I could be combing
you could be combing
he could be combing
we could be combing
you could be combing
they could be combing	I could have combed
you could have combed
he could have combed
we could have combed
you could have combed
they could have combed	I could have been combing
you could have been combing
he could have been combing
we could have been combing
you could have been combing
they could have been combing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't comb
you couldn't comb
he couldn't comb
we couldn't comb
you couldn't comb
they couldn't comb 	I couldn't be combing
you couldn't be combing
he couldn't be combing
we couldn't be combing
you couldn't be combing
they couldn't be combing	I couldn't have combed
you couldn't have combed
he couldn't have combed
we couldn't have combed
you couldn't have combed
they couldn't have combed	I couldn't have been combing
you couldn't have been combing
he couldn't have been combing
we couldn't have been combing
you couldn't have been combing
they couldn't have been combing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I comb?
could you comb?
could he comb?
could we comb?
could you comb?
could they comb? 	could I be combing?
could you be combing?
could he be combing?
could we be combing?
could you be combing?
could they be combing? 	could I have combed?
could you have combed?
could he have combed?
could we have combed?
could you have combed?
could they have combed? 	could I have been combing?
could you have been combing?
could he have been combing?
could we have been combing?
could you have been combing?
could they have been combing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I comb?
couldn't you comb?
couldn't he comb?
couldn't we comb?
couldn't you comb?
couldn't they comb? 	couldn't I be combing?
couldn't you be combing?
couldn't he be combing?
couldn't we be combing?
couldn't you be combing?
couldn't they be combing? 	couldn't I have combed?
couldn't you have combed?
couldn't he have combed?
couldn't we have combed?
couldn't you have combed?
couldn't they have combed? 	couldn't I have been combing?
couldn't you have been combing?
couldn't he have been combing?
couldn't we have been combing?
couldn't you have been combing?
couldn't they have been combing?