could grump
Verbo regular: grump - grumped- grumped

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could grump
you could grump
he could grump
we could grump
you could grump
they could grump 	I could be grumping
you could be grumping
he could be grumping
we could be grumping
you could be grumping
they could be grumping	I could have grumped
you could have grumped
he could have grumped
we could have grumped
you could have grumped
they could have grumped	I could have been grumping
you could have been grumping
he could have been grumping
we could have been grumping
you could have been grumping
they could have been grumping	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't grump
you couldn't grump
he couldn't grump
we couldn't grump
you couldn't grump
they couldn't grump 	I couldn't be grumping
you couldn't be grumping
he couldn't be grumping
we couldn't be grumping
you couldn't be grumping
they couldn't be grumping	I couldn't have grumped
you couldn't have grumped
he couldn't have grumped
we couldn't have grumped
you couldn't have grumped
they couldn't have grumped	I couldn't have been grumping
you couldn't have been grumping
he couldn't have been grumping
we couldn't have been grumping
you couldn't have been grumping
they couldn't have been grumping	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I grump?
could you grump?
could he grump?
could we grump?
could you grump?
could they grump? 	could I be grumping?
could you be grumping?
could he be grumping?
could we be grumping?
could you be grumping?
could they be grumping? 	could I have grumped?
could you have grumped?
could he have grumped?
could we have grumped?
could you have grumped?
could they have grumped? 	could I have been grumping?
could you have been grumping?
could he have been grumping?
could we have been grumping?
could you have been grumping?
could they have been grumping? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I grump?
couldn't you grump?
couldn't he grump?
couldn't we grump?
couldn't you grump?
couldn't they grump? 	couldn't I be grumping?
couldn't you be grumping?
couldn't he be grumping?
couldn't we be grumping?
couldn't you be grumping?
couldn't they be grumping? 	couldn't I have grumped?
couldn't you have grumped?
couldn't he have grumped?
couldn't we have grumped?
couldn't you have grumped?
couldn't they have grumped? 	couldn't I have been grumping?
couldn't you have been grumping?
couldn't he have been grumping?
couldn't we have been grumping?
couldn't you have been grumping?
couldn't they have been grumping?