must conceal
Verbe régulier : conceal - concealed- concealed
Traduction française : cacher - dissimuler 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must conceal
you must conceal
she must conceal
we must conceal
you must conceal
they must conceal 	I must be concealing
you must be concealing
she must be concealing
we must be concealing
you must be concealing
they must be concealing	I must have concealed
you must have concealed
she must have concealed
we must have concealed
you must have concealed
they must have concealed	I must have been concealing
you must have been concealing
she must have been concealing
we must have been concealing
you must have been concealing
they must have been concealing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't conceal
you mustn't conceal
she mustn't conceal
we mustn't conceal
you mustn't conceal
they mustn't conceal 	I mustn't be concealing
you mustn't be concealing
she mustn't be concealing
we mustn't be concealing
you mustn't be concealing
they mustn't be concealing	I mustn't have concealed
you mustn't have concealed
she mustn't have concealed
we mustn't have concealed
you mustn't have concealed
they mustn't have concealed	I mustn't have been concealing
you mustn't have been concealing
she mustn't have been concealing
we mustn't have been concealing
you mustn't have been concealing
they mustn't have been concealing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I conceal?
must you conceal?
must she conceal?
must we conceal?
must you conceal?
must they conceal? 	must I be concealing?
must you be concealing?
must she be concealing?
must we be concealing?
must you be concealing?
must they be concealing? 	must I have concealed?
must you have concealed?
must she have concealed?
must we have concealed?
must you have concealed?
must they have concealed? 	must I have been concealing?
must you have been concealing?
must she have been concealing?
must we have been concealing?
must you have been concealing?
must they have been concealing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I conceal?
mustn't you conceal?
mustn't she conceal?
mustn't we conceal?
mustn't you conceal?
mustn't they conceal? 	mustn't I be concealing?
mustn't you be concealing?
mustn't she be concealing?
mustn't we be concealing?
mustn't you be concealing?
mustn't they be concealing? 	mustn't I have concealed?
mustn't you have concealed?
mustn't she have concealed?
mustn't we have concealed?
mustn't you have concealed?
mustn't they have concealed? 	mustn't I have been concealing?
mustn't you have been concealing?
mustn't she have been concealing?
mustn't we have been concealing?
mustn't you have been concealing?
mustn't they have been concealing?