must pith
Verbe régulier : pith - pithed- pithed

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must pith
you must pith
she must pith
we must pith
you must pith
they must pith 	I must be pithing
you must be pithing
she must be pithing
we must be pithing
you must be pithing
they must be pithing	I must have pithed
you must have pithed
she must have pithed
we must have pithed
you must have pithed
they must have pithed	I must have been pithing
you must have been pithing
she must have been pithing
we must have been pithing
you must have been pithing
they must have been pithing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't pith
you mustn't pith
she mustn't pith
we mustn't pith
you mustn't pith
they mustn't pith 	I mustn't be pithing
you mustn't be pithing
she mustn't be pithing
we mustn't be pithing
you mustn't be pithing
they mustn't be pithing	I mustn't have pithed
you mustn't have pithed
she mustn't have pithed
we mustn't have pithed
you mustn't have pithed
they mustn't have pithed	I mustn't have been pithing
you mustn't have been pithing
she mustn't have been pithing
we mustn't have been pithing
you mustn't have been pithing
they mustn't have been pithing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I pith?
must you pith?
must she pith?
must we pith?
must you pith?
must they pith? 	must I be pithing?
must you be pithing?
must she be pithing?
must we be pithing?
must you be pithing?
must they be pithing? 	must I have pithed?
must you have pithed?
must she have pithed?
must we have pithed?
must you have pithed?
must they have pithed? 	must I have been pithing?
must you have been pithing?
must she have been pithing?
must we have been pithing?
must you have been pithing?
must they have been pithing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I pith?
mustn't you pith?
mustn't she pith?
mustn't we pith?
mustn't you pith?
mustn't they pith? 	mustn't I be pithing?
mustn't you be pithing?
mustn't she be pithing?
mustn't we be pithing?
mustn't you be pithing?
mustn't they be pithing? 	mustn't I have pithed?
mustn't you have pithed?
mustn't she have pithed?
mustn't we have pithed?
mustn't you have pithed?
mustn't they have pithed? 	mustn't I have been pithing?
mustn't you have been pithing?
mustn't she have been pithing?
mustn't we have been pithing?
mustn't you have been pithing?
mustn't they have been pithing?