I must inquire you must inquire he must inquire we must inquire you must inquire they must inquire
Forma con V-ing
I must be inquiring you must be inquiring he must be inquiring we must be inquiring you must be inquiring they must be inquiring
Perfecto
I must have inquired you must have inquired he must have inquired we must have inquired you must have inquired they must have inquired
Perfecto con V-ing
I must have been inquiring you must have been inquiring he must have been inquiring we must have been inquiring you must have been inquiring they must have been inquiring
Negación
Forma simple
I must not inquire you must not inquire he must not inquire we must not inquire you must not inquire they must not inquire
Forma con V-ing
I must not be inquiring you must not be inquiring he must not be inquiring we must not be inquiring you must not be inquiring they must not be inquiring
Perfecto
I must not have inquired you must not have inquired he must not have inquired we must not have inquired you must not have inquired they must not have inquired
Perfecto con V-ing
I must not have been inquiring you must not have been inquiring he must not have been inquiring we must not have been inquiring you must not have been inquiring they must not have been inquiring
Forma interrogativa
Forma simple
must I inquire? must you inquire? must he inquire? must we inquire? must you inquire? must they inquire?
Forma con V-ing
must I be inquiring? must you be inquiring? must he be inquiring? must we be inquiring? must you be inquiring? must they be inquiring?
Perfecto
must I have inquired? must you have inquired? must he have inquired? must we have inquired? must you have inquired? must they have inquired?
Perfecto con V-ing
must I have been inquiring? must you have been inquiring? must he have been inquiring? must we have been inquiring? must you have been inquiring? must they have been inquiring?
Forma interro-negativa
Forma simple
must I not inquire? must you not inquire? must he not inquire? must we not inquire? must you not inquire? must they not inquire?
Forma con V-ing
must I not be inquiring? must you not be inquiring? must he not be inquiring? must we not be inquiring? must you not be inquiring? must they not be inquiring?
Perfecto
must I not have inquired? must you not have inquired? must he not have inquired? must we not have inquired? must you not have inquired? must they not have inquired?
Perfecto con V-ing
must I not have been inquiring? must you not have been inquiring? must he not have been inquiring? must we not have been inquiring? must you not have been inquiring? must they not have been inquiring?