could tie
Verbo regular: tie - tied- tied

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could tie
you could tie
he could tie
we could tie
you could tie
they could tie 	I could be tying
you could be tying
he could be tying
we could be tying
you could be tying
they could be tying	I could have tied
you could have tied
he could have tied
we could have tied
you could have tied
they could have tied	I could have been tying
you could have been tying
he could have been tying
we could have been tying
you could have been tying
they could have been tying	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't tie
you couldn't tie
he couldn't tie
we couldn't tie
you couldn't tie
they couldn't tie 	I couldn't be tying
you couldn't be tying
he couldn't be tying
we couldn't be tying
you couldn't be tying
they couldn't be tying	I couldn't have tied
you couldn't have tied
he couldn't have tied
we couldn't have tied
you couldn't have tied
they couldn't have tied	I couldn't have been tying
you couldn't have been tying
he couldn't have been tying
we couldn't have been tying
you couldn't have been tying
they couldn't have been tying	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I tie?
could you tie?
could he tie?
could we tie?
could you tie?
could they tie? 	could I be tying?
could you be tying?
could he be tying?
could we be tying?
could you be tying?
could they be tying? 	could I have tied?
could you have tied?
could he have tied?
could we have tied?
could you have tied?
could they have tied? 	could I have been tying?
could you have been tying?
could he have been tying?
could we have been tying?
could you have been tying?
could they have been tying? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I tie?
couldn't you tie?
couldn't he tie?
couldn't we tie?
couldn't you tie?
couldn't they tie? 	couldn't I be tying?
couldn't you be tying?
couldn't he be tying?
couldn't we be tying?
couldn't you be tying?
couldn't they be tying? 	couldn't I have tied?
couldn't you have tied?
couldn't he have tied?
couldn't we have tied?
couldn't you have tied?
couldn't they have tied? 	couldn't I have been tying?
couldn't you have been tying?
couldn't he have been tying?
couldn't we have been tying?
couldn't you have been tying?
couldn't they have been tying?