must grok
Verbe régulier : grok - groked- groked

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must grok
you must grok
he must grok
we must grok
you must grok
they must grok 	I must be groking
you must be groking
he must be groking
we must be groking
you must be groking
they must be groking	I must have groked
you must have groked
he must have groked
we must have groked
you must have groked
they must have groked	I must have been groking
you must have been groking
he must have been groking
we must have been groking
you must have been groking
they must have been groking	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not grok
you must not grok
he must not grok
we must not grok
you must not grok
they must not grok 	I must not be groking
you must not be groking
he must not be groking
we must not be groking
you must not be groking
they must not be groking	I must not have groked
you must not have groked
he must not have groked
we must not have groked
you must not have groked
they must not have groked	I must not have been groking
you must not have been groking
he must not have been groking
we must not have been groking
you must not have been groking
they must not have been groking	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I grok?
must you grok?
must he grok?
must we grok?
must you grok?
must they grok? 	must I be groking?
must you be groking?
must he be groking?
must we be groking?
must you be groking?
must they be groking? 	must I have groked?
must you have groked?
must he have groked?
must we have groked?
must you have groked?
must they have groked? 	must I have been groking?
must you have been groking?
must he have been groking?
must we have been groking?
must you have been groking?
must they have been groking? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not grok?
must you not grok?
must he not grok?
must we not grok?
must you not grok?
must they not grok? 	must I not be groking?
must you not be groking?
must he not be groking?
must we not be groking?
must you not be groking?
must they not be groking? 	must I not have groked?
must you not have groked?
must he not have groked?
must we not have groked?
must you not have groked?
must they not have groked? 	must I not have been groking?
must you not have been groking?
must he not have been groking?
must we not have been groking?
must you not have been groking?
must they not have been groking?