I must refine you must refine he must refine we must refine you must refine they must refine
Forma com V-ing
I must be refining you must be refining he must be refining we must be refining you must be refining they must be refining
Perfeito
I must have refined you must have refined he must have refined we must have refined you must have refined they must have refined
Perfeito com V-ing
I must have been refining you must have been refining he must have been refining we must have been refining you must have been refining they must have been refining
Negação
Forma simple
I must not refine you must not refine he must not refine we must not refine you must not refine they must not refine
Forma com V-ing
I must not be refining you must not be refining he must not be refining we must not be refining you must not be refining they must not be refining
Perfeito
I must not have refined you must not have refined he must not have refined we must not have refined you must not have refined they must not have refined
Perfeito com V-ing
I must not have been refining you must not have been refining he must not have been refining we must not have been refining you must not have been refining they must not have been refining
Forma interrogativa
Forma simple
must I refine? must you refine? must he refine? must we refine? must you refine? must they refine?
Forma com V-ing
must I be refining? must you be refining? must he be refining? must we be refining? must you be refining? must they be refining?
Perfeito
must I have refined? must you have refined? must he have refined? must we have refined? must you have refined? must they have refined?
Perfeito com V-ing
must I have been refining? must you have been refining? must he have been refining? must we have been refining? must you have been refining? must they have been refining?
Forma interro-Negação
Forma simple
must I not refine? must you not refine? must he not refine? must we not refine? must you not refine? must they not refine?
Forma com V-ing
must I not be refining? must you not be refining? must he not be refining? must we not be refining? must you not be refining? must they not be refining?
Perfeito
must I not have refined? must you not have refined? must he not have refined? must we not have refined? must you not have refined? must they not have refined?
Perfeito com V-ing
must I not have been refining? must you not have been refining? must he not have been refining? must we not have been refining? must you not have been refining? must they not have been refining?