I must buck you must buck he must buck we must buck you must buck they must buck
Forma con V-ing
I must be bucking you must be bucking he must be bucking we must be bucking you must be bucking they must be bucking
Perfecto
I must have bucked you must have bucked he must have bucked we must have bucked you must have bucked they must have bucked
Perfecto con V-ing
I must have been bucking you must have been bucking he must have been bucking we must have been bucking you must have been bucking they must have been bucking
Negación
Forma simple
I must not buck you must not buck he must not buck we must not buck you must not buck they must not buck
Forma con V-ing
I must not be bucking you must not be bucking he must not be bucking we must not be bucking you must not be bucking they must not be bucking
Perfecto
I must not have bucked you must not have bucked he must not have bucked we must not have bucked you must not have bucked they must not have bucked
Perfecto con V-ing
I must not have been bucking you must not have been bucking he must not have been bucking we must not have been bucking you must not have been bucking they must not have been bucking
Forma interrogativa
Forma simple
must I buck? must you buck? must he buck? must we buck? must you buck? must they buck?
Forma con V-ing
must I be bucking? must you be bucking? must he be bucking? must we be bucking? must you be bucking? must they be bucking?
Perfecto
must I have bucked? must you have bucked? must he have bucked? must we have bucked? must you have bucked? must they have bucked?
Perfecto con V-ing
must I have been bucking? must you have been bucking? must he have been bucking? must we have been bucking? must you have been bucking? must they have been bucking?
Forma interro-negativa
Forma simple
must I not buck? must you not buck? must he not buck? must we not buck? must you not buck? must they not buck?
Forma con V-ing
must I not be bucking? must you not be bucking? must he not be bucking? must we not be bucking? must you not be bucking? must they not be bucking?
Perfecto
must I not have bucked? must you not have bucked? must he not have bucked? must we not have bucked? must you not have bucked? must they not have bucked?
Perfecto con V-ing
must I not have been bucking? must you not have been bucking? must he not have been bucking? must we not have been bucking? must you not have been bucking? must they not have been bucking?