I must crab you must crab he must crab we must crab you must crab they must crab
Forma con V-ing
I must be crabbing you must be crabbing he must be crabbing we must be crabbing you must be crabbing they must be crabbing
Perfecto
I must have crabbed you must have crabbed he must have crabbed we must have crabbed you must have crabbed they must have crabbed
Perfecto con V-ing
I must have been crabbing you must have been crabbing he must have been crabbing we must have been crabbing you must have been crabbing they must have been crabbing
Negación
Forma simple
I must not crab you must not crab he must not crab we must not crab you must not crab they must not crab
Forma con V-ing
I must not be crabbing you must not be crabbing he must not be crabbing we must not be crabbing you must not be crabbing they must not be crabbing
Perfecto
I must not have crabbed you must not have crabbed he must not have crabbed we must not have crabbed you must not have crabbed they must not have crabbed
Perfecto con V-ing
I must not have been crabbing you must not have been crabbing he must not have been crabbing we must not have been crabbing you must not have been crabbing they must not have been crabbing
Forma interrogativa
Forma simple
must I crab? must you crab? must he crab? must we crab? must you crab? must they crab?
Forma con V-ing
must I be crabbing? must you be crabbing? must he be crabbing? must we be crabbing? must you be crabbing? must they be crabbing?
Perfecto
must I have crabbed? must you have crabbed? must he have crabbed? must we have crabbed? must you have crabbed? must they have crabbed?
Perfecto con V-ing
must I have been crabbing? must you have been crabbing? must he have been crabbing? must we have been crabbing? must you have been crabbing? must they have been crabbing?
Forma interro-negativa
Forma simple
must I not crab? must you not crab? must he not crab? must we not crab? must you not crab? must they not crab?
Forma con V-ing
must I not be crabbing? must you not be crabbing? must he not be crabbing? must we not be crabbing? must you not be crabbing? must they not be crabbing?
Perfecto
must I not have crabbed? must you not have crabbed? must he not have crabbed? must we not have crabbed? must you not have crabbed? must they not have crabbed?
Perfecto con V-ing
must I not have been crabbing? must you not have been crabbing? must he not have been crabbing? must we not have been crabbing? must you not have been crabbing? must they not have been crabbing?