must describe
Verbo regular: describe - described- described

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con 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	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't describe
you mustn't describe
he mustn't describe
we mustn't describe
you mustn't describe
they mustn't describe 	I mustn't be describing
you mustn't be describing
he mustn't be describing
we mustn't be describing
you mustn't be describing
they mustn't be describing	I mustn't have described
you mustn't have described
he mustn't have described
we mustn't have described
you mustn't have described
they mustn't have described	I mustn't have been describing
you mustn't have been describing
he mustn't have been describing
we mustn't have been describing
you mustn't have been describing
they mustn't have been describing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con 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? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I describe?
mustn't you describe?
mustn't he describe?
mustn't we describe?
mustn't you describe?
mustn't they describe? 	mustn't I be describing?
mustn't you be describing?
mustn't he be describing?
mustn't we be describing?
mustn't you be describing?
mustn't they be describing? 	mustn't I have described?
mustn't you have described?
mustn't he have described?
mustn't we have described?
mustn't you have described?
mustn't they have described? 	mustn't I have been describing?
mustn't you have been describing?
mustn't he have been describing?
mustn't we have been describing?
mustn't you have been describing?
mustn't they have been describing?