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