Conjugación del verbo inglés
MUST BUTTER

Verbo regular: butter - buttered - buttered

Afirmación

Forma simple	Forma con V-ing
I must butter you must butter he must butter we must butter you must butter they must butter	I must be buttering you must be buttering he must be buttering we must be buttering you must be buttering they must be buttering
Perfecto	Perfecto con V-ing
I must have buttered you must have buttered he must have buttered we must have buttered you must have buttered they must have buttered	I must have been buttering you must have been buttering he must have been buttering we must have been buttering you must have been buttering they must have been buttering

Negación

Forma simple	Forma con V-ing
I must not butter you must not butter he must not butter we must not butter you must not butter they must not butter	I must not be buttering you must not be buttering he must not be buttering we must not be buttering you must not be buttering they must not be buttering
Perfecto	Perfecto con V-ing
I must not have buttered you must not have buttered he must not have buttered we must not have buttered you must not have buttered they must not have buttered	I must not have been buttering you must not have been buttering he must not have been buttering we must not have been buttering you must not have been buttering they must not have been buttering

Forma interrogativa

Forma simple	Forma con V-ing
must I butter? must you butter? must he butter? must we butter? must you butter? must they butter?	must I be buttering? must you be buttering? must he be buttering? must we be buttering? must you be buttering? must they be buttering?
Perfecto	Perfecto con V-ing
must I have buttered? must you have buttered? must he have buttered? must we have buttered? must you have buttered? must they have buttered?	must I have been buttering? must you have been buttering? must he have been buttering? must we have been buttering? must you have been buttering? must they have been buttering?

Forma interro-negativa

Forma simple	Forma con V-ing
must I not butter? must you not butter? must he not butter? must we not butter? must you not butter? must they not butter?	must I not be buttering? must you not be buttering? must he not be buttering? must we not be buttering? must you not be buttering? must they not be buttering?
Perfecto	Perfecto con V-ing
must I not have buttered? must you not have buttered? must he not have buttered? must we not have buttered? must you not have buttered? must they not have buttered?	must I not have been buttering? must you not have been buttering? must he not have been buttering? must we not have been buttering? must you not have been buttering? must they not have been buttering?