can grump
Verbe régulier : grump - grumped- grumped

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I can grump
you can grump
she can grump
we can grump
you can grump
they can grump 	I can be grumping
you can be grumping
she can be grumping
we can be grumping
you can be grumping
they can be grumping	I can have grumped
you can have grumped
she can have grumped
we can have grumped
you can have grumped
they can have grumped	I can have been grumping
you can have been grumping
she can have been grumping
we can have been grumping
you can have been grumping
they can have been grumping	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I cannot grump
you cannot grump
she cannot grump
we cannot grump
you cannot grump
they cannot grump 	I cannot be grumping
you cannot be grumping
she cannot be grumping
we cannot be grumping
you cannot be grumping
they cannot be grumping	I cannot have grumped
you cannot have grumped
she cannot have grumped
we cannot have grumped
you cannot have grumped
they cannot have grumped	I cannot have been grumping
you cannot have been grumping
she cannot have been grumping
we cannot have been grumping
you cannot have been grumping
they cannot have been grumping	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
can I grump?
can you grump?
can she grump?
can we grump?
can you grump?
can they grump? 	can I be grumping?
can you be grumping?
can she be grumping?
can we be grumping?
can you be grumping?
can they be grumping? 	can I have grumped?
can you have grumped?
can she have grumped?
can we have grumped?
can you have grumped?
can they have grumped? 	can I have been grumping?
can you have been grumping?
can she have been grumping?
can we have been grumping?
can you have been grumping?
can they have been grumping? 	

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