must drub
Verbe régulier : drub - drubbed- drubbed

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must drub
you must drub
she must drub
we must drub
you must drub
they must drub 	I must be drubbing
you must be drubbing
she must be drubbing
we must be drubbing
you must be drubbing
they must be drubbing	I must have drubbed
you must have drubbed
she must have drubbed
we must have drubbed
you must have drubbed
they must have drubbed	I must have been drubbing
you must have been drubbing
she must have been drubbing
we must have been drubbing
you must have been drubbing
they must have been drubbing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't drub
you mustn't drub
she mustn't drub
we mustn't drub
you mustn't drub
they mustn't drub 	I mustn't be drubbing
you mustn't be drubbing
she mustn't be drubbing
we mustn't be drubbing
you mustn't be drubbing
they mustn't be drubbing	I mustn't have drubbed
you mustn't have drubbed
she mustn't have drubbed
we mustn't have drubbed
you mustn't have drubbed
they mustn't have drubbed	I mustn't have been drubbing
you mustn't have been drubbing
she mustn't have been drubbing
we mustn't have been drubbing
you mustn't have been drubbing
they mustn't have been drubbing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I drub?
must you drub?
must she drub?
must we drub?
must you drub?
must they drub? 	must I be drubbing?
must you be drubbing?
must she be drubbing?
must we be drubbing?
must you be drubbing?
must they be drubbing? 	must I have drubbed?
must you have drubbed?
must she have drubbed?
must we have drubbed?
must you have drubbed?
must they have drubbed? 	must I have been drubbing?
must you have been drubbing?
must she have been drubbing?
must we have been drubbing?
must you have been drubbing?
must they have been drubbing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I drub?
mustn't you drub?
mustn't she drub?
mustn't we drub?
mustn't you drub?
mustn't they drub? 	mustn't I be drubbing?
mustn't you be drubbing?
mustn't she be drubbing?
mustn't we be drubbing?
mustn't you be drubbing?
mustn't they be drubbing? 	mustn't I have drubbed?
mustn't you have drubbed?
mustn't she have drubbed?
mustn't we have drubbed?
mustn't you have drubbed?
mustn't they have drubbed? 	mustn't I have been drubbing?
mustn't you have been drubbing?
mustn't she have been drubbing?
mustn't we have been drubbing?
mustn't you have been drubbing?
mustn't they have been drubbing?