Crear
°Could
°Should
°Would
°Must
°Will
°Ought to
°Shall
°Might
°May
°Can
Possibility in the future as could
It is used to ask something politely and to indicate that we prefer
Is less common and never used in interrogations in american english
It is an obligation or recommendation
Express determination to do something, but it is also used to form the future
It is used to form the future, although it is more formal
Express obligation, prohibition, or necessity; It is a stronger obligation.
Synonym of may is used to express probability
Ability or possibility
Ability or possibility in the past