could close
Verbo regular: close - closed- closed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could close
you could close
he could close
we could close
you could close
they could close 	I could be closing
you could be closing
he could be closing
we could be closing
you could be closing
they could be closing	I could have closed
you could have closed
he could have closed
we could have closed
you could have closed
they could have closed	I could have been closing
you could have been closing
he could have been closing
we could have been closing
you could have been closing
they could have been closing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't close
you couldn't close
he couldn't close
we couldn't close
you couldn't close
they couldn't close 	I couldn't be closing
you couldn't be closing
he couldn't be closing
we couldn't be closing
you couldn't be closing
they couldn't be closing	I couldn't have closed
you couldn't have closed
he couldn't have closed
we couldn't have closed
you couldn't have closed
they couldn't have closed	I couldn't have been closing
you couldn't have been closing
he couldn't have been closing
we couldn't have been closing
you couldn't have been closing
they couldn't have been closing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I close?
could you close?
could he close?
could we close?
could you close?
could they close? 	could I be closing?
could you be closing?
could he be closing?
could we be closing?
could you be closing?
could they be closing? 	could I have closed?
could you have closed?
could he have closed?
could we have closed?
could you have closed?
could they have closed? 	could I have been closing?
could you have been closing?
could he have been closing?
could we have been closing?
could you have been closing?
could they have been closing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I close?
couldn't you close?
couldn't he close?
couldn't we close?
couldn't you close?
couldn't they close? 	couldn't I be closing?
couldn't you be closing?
couldn't he be closing?
couldn't we be closing?
couldn't you be closing?
couldn't they be closing? 	couldn't I have closed?
couldn't you have closed?
couldn't he have closed?
couldn't we have closed?
couldn't you have closed?
couldn't they have closed? 	couldn't I have been closing?
couldn't you have been closing?
couldn't he have been closing?
couldn't we have been closing?
couldn't you have been closing?
couldn't they have been closing?