must chap
Verbe régulier : chap - chapped- chapped
Traduction française : gercer - (se) gercer 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must chap
you must chap
she must chap
we must chap
you must chap
they must chap 	I must be chapping
you must be chapping
she must be chapping
we must be chapping
you must be chapping
they must be chapping	I must have chapped
you must have chapped
she must have chapped
we must have chapped
you must have chapped
they must have chapped	I must have been chapping
you must have been chapping
she must have been chapping
we must have been chapping
you must have been chapping
they must have been chapping	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't chap
you mustn't chap
she mustn't chap
we mustn't chap
you mustn't chap
they mustn't chap 	I mustn't be chapping
you mustn't be chapping
she mustn't be chapping
we mustn't be chapping
you mustn't be chapping
they mustn't be chapping	I mustn't have chapped
you mustn't have chapped
she mustn't have chapped
we mustn't have chapped
you mustn't have chapped
they mustn't have chapped	I mustn't have been chapping
you mustn't have been chapping
she mustn't have been chapping
we mustn't have been chapping
you mustn't have been chapping
they mustn't have been chapping	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I chap?
must you chap?
must she chap?
must we chap?
must you chap?
must they chap? 	must I be chapping?
must you be chapping?
must she be chapping?
must we be chapping?
must you be chapping?
must they be chapping? 	must I have chapped?
must you have chapped?
must she have chapped?
must we have chapped?
must you have chapped?
must they have chapped? 	must I have been chapping?
must you have been chapping?
must she have been chapping?
must we have been chapping?
must you have been chapping?
must they have been chapping? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I chap?
mustn't you chap?
mustn't she chap?
mustn't we chap?
mustn't you chap?
mustn't they chap? 	mustn't I be chapping?
mustn't you be chapping?
mustn't she be chapping?
mustn't we be chapping?
mustn't you be chapping?
mustn't they be chapping? 	mustn't I have chapped?
mustn't you have chapped?
mustn't she have chapped?
mustn't we have chapped?
mustn't you have chapped?
mustn't they have chapped? 	mustn't I have been chapping?
mustn't you have been chapping?
mustn't she have been chapping?
mustn't we have been chapping?
mustn't you have been chapping?
mustn't they have been chapping?