could disappear
Verbo regular: disappear - disappeared- disappeared

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could disappear
you could disappear
he could disappear
we could disappear
you could disappear
they could disappear 	I could be disappearing
you could be disappearing
he could be disappearing
we could be disappearing
you could be disappearing
they could be disappearing	I could have disappeared
you could have disappeared
he could have disappeared
we could have disappeared
you could have disappeared
they could have disappeared	I could have been disappearing
you could have been disappearing
he could have been disappearing
we could have been disappearing
you could have been disappearing
they could have been disappearing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't disappear
you couldn't disappear
he couldn't disappear
we couldn't disappear
you couldn't disappear
they couldn't disappear 	I couldn't be disappearing
you couldn't be disappearing
he couldn't be disappearing
we couldn't be disappearing
you couldn't be disappearing
they couldn't be disappearing	I couldn't have disappeared
you couldn't have disappeared
he couldn't have disappeared
we couldn't have disappeared
you couldn't have disappeared
they couldn't have disappeared	I couldn't have been disappearing
you couldn't have been disappearing
he couldn't have been disappearing
we couldn't have been disappearing
you couldn't have been disappearing
they couldn't have been disappearing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I disappear?
could you disappear?
could he disappear?
could we disappear?
could you disappear?
could they disappear? 	could I be disappearing?
could you be disappearing?
could he be disappearing?
could we be disappearing?
could you be disappearing?
could they be disappearing? 	could I have disappeared?
could you have disappeared?
could he have disappeared?
could we have disappeared?
could you have disappeared?
could they have disappeared? 	could I have been disappearing?
could you have been disappearing?
could he have been disappearing?
could we have been disappearing?
could you have been disappearing?
could they have been disappearing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I disappear?
couldn't you disappear?
couldn't he disappear?
couldn't we disappear?
couldn't you disappear?
couldn't they disappear? 	couldn't I be disappearing?
couldn't you be disappearing?
couldn't he be disappearing?
couldn't we be disappearing?
couldn't you be disappearing?
couldn't they be disappearing? 	couldn't I have disappeared?
couldn't you have disappeared?
couldn't he have disappeared?
couldn't we have disappeared?
couldn't you have disappeared?
couldn't they have disappeared? 	couldn't I have been disappearing?
couldn't you have been disappearing?
couldn't he have been disappearing?
couldn't we have been disappearing?
couldn't you have been disappearing?
couldn't they have been disappearing?