could pluck
Verbo regular: pluck - plucked- plucked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could pluck
you could pluck
he could pluck
we could pluck
you could pluck
they could pluck 	I could be plucking
you could be plucking
he could be plucking
we could be plucking
you could be plucking
they could be plucking	I could have plucked
you could have plucked
he could have plucked
we could have plucked
you could have plucked
they could have plucked	I could have been plucking
you could have been plucking
he could have been plucking
we could have been plucking
you could have been plucking
they could have been plucking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't pluck
you couldn't pluck
he couldn't pluck
we couldn't pluck
you couldn't pluck
they couldn't pluck 	I couldn't be plucking
you couldn't be plucking
he couldn't be plucking
we couldn't be plucking
you couldn't be plucking
they couldn't be plucking	I couldn't have plucked
you couldn't have plucked
he couldn't have plucked
we couldn't have plucked
you couldn't have plucked
they couldn't have plucked	I couldn't have been plucking
you couldn't have been plucking
he couldn't have been plucking
we couldn't have been plucking
you couldn't have been plucking
they couldn't have been plucking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I pluck?
could you pluck?
could he pluck?
could we pluck?
could you pluck?
could they pluck? 	could I be plucking?
could you be plucking?
could he be plucking?
could we be plucking?
could you be plucking?
could they be plucking? 	could I have plucked?
could you have plucked?
could he have plucked?
could we have plucked?
could you have plucked?
could they have plucked? 	could I have been plucking?
could you have been plucking?
could he have been plucking?
could we have been plucking?
could you have been plucking?
could they have been plucking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I pluck?
couldn't you pluck?
couldn't he pluck?
couldn't we pluck?
couldn't you pluck?
couldn't they pluck? 	couldn't I be plucking?
couldn't you be plucking?
couldn't he be plucking?
couldn't we be plucking?
couldn't you be plucking?
couldn't they be plucking? 	couldn't I have plucked?
couldn't you have plucked?
couldn't he have plucked?
couldn't we have plucked?
couldn't you have plucked?
couldn't they have plucked? 	couldn't I have been plucking?
couldn't you have been plucking?
couldn't he have been plucking?
couldn't we have been plucking?
couldn't you have been plucking?
couldn't they have been plucking?