must design
Verbe régulier : design - designed- designed
Traduction française : concevoir - dessiner 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must design
you must design
she must design
we must design
you must design
they must design 	I must be designing
you must be designing
she must be designing
we must be designing
you must be designing
they must be designing	I must have designed
you must have designed
she must have designed
we must have designed
you must have designed
they must have designed	I must have been designing
you must have been designing
she must have been designing
we must have been designing
you must have been designing
they must have been designing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't design
you mustn't design
she mustn't design
we mustn't design
you mustn't design
they mustn't design 	I mustn't be designing
you mustn't be designing
she mustn't be designing
we mustn't be designing
you mustn't be designing
they mustn't be designing	I mustn't have designed
you mustn't have designed
she mustn't have designed
we mustn't have designed
you mustn't have designed
they mustn't have designed	I mustn't have been designing
you mustn't have been designing
she mustn't have been designing
we mustn't have been designing
you mustn't have been designing
they mustn't have been designing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I design?
must you design?
must she design?
must we design?
must you design?
must they design? 	must I be designing?
must you be designing?
must she be designing?
must we be designing?
must you be designing?
must they be designing? 	must I have designed?
must you have designed?
must she have designed?
must we have designed?
must you have designed?
must they have designed? 	must I have been designing?
must you have been designing?
must she have been designing?
must we have been designing?
must you have been designing?
must they have been designing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I design?
mustn't you design?
mustn't she design?
mustn't we design?
mustn't you design?
mustn't they design? 	mustn't I be designing?
mustn't you be designing?
mustn't she be designing?
mustn't we be designing?
mustn't you be designing?
mustn't they be designing? 	mustn't I have designed?
mustn't you have designed?
mustn't she have designed?
mustn't we have designed?
mustn't you have designed?
mustn't they have designed? 	mustn't I have been designing?
mustn't you have been designing?
mustn't she have been designing?
mustn't we have been designing?
mustn't you have been designing?
mustn't they have been designing?