could thin
Verbo regular: thin - thinned- thinned

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could thin
you could thin
he could thin
we could thin
you could thin
they could thin 	I could be thinning
you could be thinning
he could be thinning
we could be thinning
you could be thinning
they could be thinning	I could have thinned
you could have thinned
he could have thinned
we could have thinned
you could have thinned
they could have thinned	I could have been thinning
you could have been thinning
he could have been thinning
we could have been thinning
you could have been thinning
they could have been thinning	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't thin
you couldn't thin
he couldn't thin
we couldn't thin
you couldn't thin
they couldn't thin 	I couldn't be thinning
you couldn't be thinning
he couldn't be thinning
we couldn't be thinning
you couldn't be thinning
they couldn't be thinning	I couldn't have thinned
you couldn't have thinned
he couldn't have thinned
we couldn't have thinned
you couldn't have thinned
they couldn't have thinned	I couldn't have been thinning
you couldn't have been thinning
he couldn't have been thinning
we couldn't have been thinning
you couldn't have been thinning
they couldn't have been thinning	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I thin?
could you thin?
could he thin?
could we thin?
could you thin?
could they thin? 	could I be thinning?
could you be thinning?
could he be thinning?
could we be thinning?
could you be thinning?
could they be thinning? 	could I have thinned?
could you have thinned?
could he have thinned?
could we have thinned?
could you have thinned?
could they have thinned? 	could I have been thinning?
could you have been thinning?
could he have been thinning?
could we have been thinning?
could you have been thinning?
could they have been thinning? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I thin?
couldn't you thin?
couldn't he thin?
couldn't we thin?
couldn't you thin?
couldn't they thin? 	couldn't I be thinning?
couldn't you be thinning?
couldn't he be thinning?
couldn't we be thinning?
couldn't you be thinning?
couldn't they be thinning? 	couldn't I have thinned?
couldn't you have thinned?
couldn't he have thinned?
couldn't we have thinned?
couldn't you have thinned?
couldn't they have thinned? 	couldn't I have been thinning?
couldn't you have been thinning?
couldn't he have been thinning?
couldn't we have been thinning?
couldn't you have been thinning?
couldn't they have been thinning?