could grump
Verbe régulier : grump - grumped- grumped

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en 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	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could not grump
you could not grump
he could not grump
we could not grump
you could not grump
they could not grump 	I could not be grumping
you could not be grumping
he could not be grumping
we could not be grumping
you could not be grumping
they could not be grumping	I could not have grumped
you could not have grumped
he could not have grumped
we could not have grumped
you could not have grumped
they could not have grumped	I could not have been grumping
you could not have been grumping
he could not have been grumping
we could not have been grumping
you could not have been grumping
they could not have been grumping	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en 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? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I not grump?
could you not grump?
could he not grump?
could we not grump?
could you not grump?
could they not grump? 	could I not be grumping?
could you not be grumping?
could he not be grumping?
could we not be grumping?
could you not be grumping?
could they not be grumping? 	could I not have grumped?
could you not have grumped?
could he not have grumped?
could we not have grumped?
could you not have grumped?
could they not have grumped? 	could I not have been grumping?
could you not have been grumping?
could he not have been grumping?
could we not have been grumping?
could you not have been grumping?
could they not have been grumping?