could invert
Verbo regular: invert - inverted- inverted

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could invert
you could invert
he could invert
we could invert
you could invert
they could invert 	I could be inverting
you could be inverting
he could be inverting
we could be inverting
you could be inverting
they could be inverting	I could have inverted
you could have inverted
he could have inverted
we could have inverted
you could have inverted
they could have inverted	I could have been inverting
you could have been inverting
he could have been inverting
we could have been inverting
you could have been inverting
they could have been inverting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't invert
you couldn't invert
he couldn't invert
we couldn't invert
you couldn't invert
they couldn't invert 	I couldn't be inverting
you couldn't be inverting
he couldn't be inverting
we couldn't be inverting
you couldn't be inverting
they couldn't be inverting	I couldn't have inverted
you couldn't have inverted
he couldn't have inverted
we couldn't have inverted
you couldn't have inverted
they couldn't have inverted	I couldn't have been inverting
you couldn't have been inverting
he couldn't have been inverting
we couldn't have been inverting
you couldn't have been inverting
they couldn't have been inverting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I invert?
could you invert?
could he invert?
could we invert?
could you invert?
could they invert? 	could I be inverting?
could you be inverting?
could he be inverting?
could we be inverting?
could you be inverting?
could they be inverting? 	could I have inverted?
could you have inverted?
could he have inverted?
could we have inverted?
could you have inverted?
could they have inverted? 	could I have been inverting?
could you have been inverting?
could he have been inverting?
could we have been inverting?
could you have been inverting?
could they have been inverting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I invert?
couldn't you invert?
couldn't he invert?
couldn't we invert?
couldn't you invert?
couldn't they invert? 	couldn't I be inverting?
couldn't you be inverting?
couldn't he be inverting?
couldn't we be inverting?
couldn't you be inverting?
couldn't they be inverting? 	couldn't I have inverted?
couldn't you have inverted?
couldn't he have inverted?
couldn't we have inverted?
couldn't you have inverted?
couldn't they have inverted? 	couldn't I have been inverting?
couldn't you have been inverting?
couldn't he have been inverting?
couldn't we have been inverting?
couldn't you have been inverting?
couldn't they have been inverting?