must richen
Verbe régulier : richen - richened- richened

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must richen
you must richen
she must richen
we must richen
you must richen
they must richen 	I must be richening
you must be richening
she must be richening
we must be richening
you must be richening
they must be richening	I must have richened
you must have richened
she must have richened
we must have richened
you must have richened
they must have richened	I must have been richening
you must have been richening
she must have been richening
we must have been richening
you must have been richening
they must have been richening	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't richen
you mustn't richen
she mustn't richen
we mustn't richen
you mustn't richen
they mustn't richen 	I mustn't be richening
you mustn't be richening
she mustn't be richening
we mustn't be richening
you mustn't be richening
they mustn't be richening	I mustn't have richened
you mustn't have richened
she mustn't have richened
we mustn't have richened
you mustn't have richened
they mustn't have richened	I mustn't have been richening
you mustn't have been richening
she mustn't have been richening
we mustn't have been richening
you mustn't have been richening
they mustn't have been richening	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I richen?
must you richen?
must she richen?
must we richen?
must you richen?
must they richen? 	must I be richening?
must you be richening?
must she be richening?
must we be richening?
must you be richening?
must they be richening? 	must I have richened?
must you have richened?
must she have richened?
must we have richened?
must you have richened?
must they have richened? 	must I have been richening?
must you have been richening?
must she have been richening?
must we have been richening?
must you have been richening?
must they have been richening? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I richen?
mustn't you richen?
mustn't she richen?
mustn't we richen?
mustn't you richen?
mustn't they richen? 	mustn't I be richening?
mustn't you be richening?
mustn't she be richening?
mustn't we be richening?
mustn't you be richening?
mustn't they be richening? 	mustn't I have richened?
mustn't you have richened?
mustn't she have richened?
mustn't we have richened?
mustn't you have richened?
mustn't they have richened? 	mustn't I have been richening?
mustn't you have been richening?
mustn't she have been richening?
mustn't we have been richening?
mustn't you have been richening?
mustn't they have been richening?