must describe
Verbe régulier : describe - described- described
Traduction française : décrire - définir 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must describe
you must describe
he must describe
we must describe
you must describe
they must describe 	I must be describing
you must be describing
he must be describing
we must be describing
you must be describing
they must be describing	I must have described
you must have described
he must have described
we must have described
you must have described
they must have described	I must have been describing
you must have been describing
he must have been describing
we must have been describing
you must have been describing
they must have been describing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not describe
you must not describe
he must not describe
we must not describe
you must not describe
they must not describe 	I must not be describing
you must not be describing
he must not be describing
we must not be describing
you must not be describing
they must not be describing	I must not have described
you must not have described
he must not have described
we must not have described
you must not have described
they must not have described	I must not have been describing
you must not have been describing
he must not have been describing
we must not have been describing
you must not have been describing
they must not have been describing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I describe?
must you describe?
must he describe?
must we describe?
must you describe?
must they describe? 	must I be describing?
must you be describing?
must he be describing?
must we be describing?
must you be describing?
must they be describing? 	must I have described?
must you have described?
must he have described?
must we have described?
must you have described?
must they have described? 	must I have been describing?
must you have been describing?
must he have been describing?
must we have been describing?
must you have been describing?
must they have been describing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not describe?
must you not describe?
must he not describe?
must we not describe?
must you not describe?
must they not describe? 	must I not be describing?
must you not be describing?
must he not be describing?
must we not be describing?
must you not be describing?
must they not be describing? 	must I not have described?
must you not have described?
must he not have described?
must we not have described?
must you not have described?
must they not have described? 	must I not have been describing?
must you not have been describing?
must he not have been describing?
must we not have been describing?
must you not have been describing?
must they not have been describing?