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 must not design
you must not design
she must not design
we must not design
you must not design
they must not design 	I must not be designing
you must not be designing
she must not be designing
we must not be designing
you must not be designing
they must not be designing	I must not have designed
you must not have designed
she must not have designed
we must not have designed
you must not have designed
they must not have designed	I must not have been designing
you must not have been designing
she must not have been designing
we must not have been designing
you must not have been designing
they must not 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 	
must I not design?
must you not design?
must she not design?
must we not design?
must you not design?
must they not design? 	must I not be designing?
must you not be designing?
must she not be designing?
must we not be designing?
must you not be designing?
must they not be designing? 	must I not have designed?
must you not have designed?
must she not have designed?
must we not have designed?
must you not have designed?
must they not have designed? 	must I not have been designing?
must you not have been designing?
must she not have been designing?
must we not have been designing?
must you not have been designing?
must they not have been designing?