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 must not conceal
you must not conceal
she must not conceal
we must not conceal
you must not conceal
they must not conceal 	I must not be concealing
you must not be concealing
she must not be concealing
we must not be concealing
you must not be concealing
they must not be concealing	I must not have concealed
you must not have concealed
she must not have concealed
we must not have concealed
you must not have concealed
they must not have concealed	I must not have been concealing
you must not have been concealing
she must not have been concealing
we must not have been concealing
you must not have been concealing
they must not 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 	
must I not conceal?
must you not conceal?
must she not conceal?
must we not conceal?
must you not conceal?
must they not conceal? 	must I not be concealing?
must you not be concealing?
must she not be concealing?
must we not be concealing?
must you not be concealing?
must they not be concealing? 	must I not have concealed?
must you not have concealed?
must she not have concealed?
must we not have concealed?
must you not have concealed?
must they not have concealed? 	must I not have been concealing?
must you not have been concealing?
must she not have been concealing?
must we not have been concealing?
must you not have been concealing?
must they not have been concealing?