must grain
Verbe régulier : grain - grained- grained
Traduction française : cristalliser - se cristalliser 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must grain
you must grain
she must grain
we must grain
you must grain
they must grain 	I must be graining
you must be graining
she must be graining
we must be graining
you must be graining
they must be graining	I must have grained
you must have grained
she must have grained
we must have grained
you must have grained
they must have grained	I must have been graining
you must have been graining
she must have been graining
we must have been graining
you must have been graining
they must have been graining	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't grain
you mustn't grain
she mustn't grain
we mustn't grain
you mustn't grain
they mustn't grain 	I mustn't be graining
you mustn't be graining
she mustn't be graining
we mustn't be graining
you mustn't be graining
they mustn't be graining	I mustn't have grained
you mustn't have grained
she mustn't have grained
we mustn't have grained
you mustn't have grained
they mustn't have grained	I mustn't have been graining
you mustn't have been graining
she mustn't have been graining
we mustn't have been graining
you mustn't have been graining
they mustn't have been graining	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I grain?
must you grain?
must she grain?
must we grain?
must you grain?
must they grain? 	must I be graining?
must you be graining?
must she be graining?
must we be graining?
must you be graining?
must they be graining? 	must I have grained?
must you have grained?
must she have grained?
must we have grained?
must you have grained?
must they have grained? 	must I have been graining?
must you have been graining?
must she have been graining?
must we have been graining?
must you have been graining?
must they have been graining? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I grain?
mustn't you grain?
mustn't she grain?
mustn't we grain?
mustn't you grain?
mustn't they grain? 	mustn't I be graining?
mustn't you be graining?
mustn't she be graining?
mustn't we be graining?
mustn't you be graining?
mustn't they be graining? 	mustn't I have grained?
mustn't you have grained?
mustn't she have grained?
mustn't we have grained?
mustn't you have grained?
mustn't they have grained? 	mustn't I have been graining?
mustn't you have been graining?
mustn't she have been graining?
mustn't we have been graining?
mustn't you have been graining?
mustn't they have been graining?