I must donate you must donate she must donate we must donate you must donate they must donate
Forma con V-ing
I must be donating you must be donating she must be donating we must be donating you must be donating they must be donating
Perfecto
I must have donated you must have donated she must have donated we must have donated you must have donated they must have donated
Perfecto con V-ing
I must have been donating you must have been donating she must have been donating we must have been donating you must have been donating they must have been donating
Negación
Forma simple
I must not donate you must not donate she must not donate we must not donate you must not donate they must not donate
Forma con V-ing
I must not be donating you must not be donating she must not be donating we must not be donating you must not be donating they must not be donating
Perfecto
I must not have donated you must not have donated she must not have donated we must not have donated you must not have donated they must not have donated
Perfecto con V-ing
I must not have been donating you must not have been donating she must not have been donating we must not have been donating you must not have been donating they must not have been donating
Forma interrogativa
Forma simple
must I donate? must you donate? must she donate? must we donate? must you donate? must they donate?
Forma con V-ing
must I be donating? must you be donating? must she be donating? must we be donating? must you be donating? must they be donating?
Perfecto
must I have donated? must you have donated? must she have donated? must we have donated? must you have donated? must they have donated?
Perfecto con V-ing
must I have been donating? must you have been donating? must she have been donating? must we have been donating? must you have been donating? must they have been donating?
Forma interro-negativa
Forma simple
must I not donate? must you not donate? must she not donate? must we not donate? must you not donate? must they not donate?
Forma con V-ing
must I not be donating? must you not be donating? must she not be donating? must we not be donating? must you not be donating? must they not be donating?
Perfecto
must I not have donated? must you not have donated? must she not have donated? must we not have donated? must you not have donated? must they not have donated?
Perfecto con V-ing
must I not have been donating? must you not have been donating? must she not have been donating? must we not have been donating? must you not have been donating? must they not have been donating?