I must cause you must cause he must cause we must cause you must cause they must cause
Forma con V-ing
I must be causing you must be causing he must be causing we must be causing you must be causing they must be causing
Perfecto
I must have caused you must have caused he must have caused we must have caused you must have caused they must have caused
Perfecto con V-ing
I must have been causing you must have been causing he must have been causing we must have been causing you must have been causing they must have been causing
Negación
Forma simple
I must not cause you must not cause he must not cause we must not cause you must not cause they must not cause
Forma con V-ing
I must not be causing you must not be causing he must not be causing we must not be causing you must not be causing they must not be causing
Perfecto
I must not have caused you must not have caused he must not have caused we must not have caused you must not have caused they must not have caused
Perfecto con V-ing
I must not have been causing you must not have been causing he must not have been causing we must not have been causing you must not have been causing they must not have been causing
Forma interrogativa
Forma simple
must I cause? must you cause? must he cause? must we cause? must you cause? must they cause?
Forma con V-ing
must I be causing? must you be causing? must he be causing? must we be causing? must you be causing? must they be causing?
Perfecto
must I have caused? must you have caused? must he have caused? must we have caused? must you have caused? must they have caused?
Perfecto con V-ing
must I have been causing? must you have been causing? must he have been causing? must we have been causing? must you have been causing? must they have been causing?
Forma interro-negativa
Forma simple
must I not cause? must you not cause? must he not cause? must we not cause? must you not cause? must they not cause?
Forma con V-ing
must I not be causing? must you not be causing? must he not be causing? must we not be causing? must you not be causing? must they not be causing?
Perfecto
must I not have caused? must you not have caused? must he not have caused? must we not have caused? must you not have caused? must they not have caused?
Perfecto con V-ing
must I not have been causing? must you not have been causing? must he not have been causing? must we not have been causing? must you not have been causing? must they not have been causing?