The subjunctive mood — a grammatical mood used to express hypotheticals, wishes, or non-real situations. Often corresponds to the English subjunctive.
英語の 'If I were you' は仮定法の一例だ。
'If I were you' in English is an example of the subjunctive.
日本語では『〜ば』や『〜たら』が仮定法的に使われることがある。
In Japanese, '~ba' and '~tara' can sometimes be used in a subjunctive/conditional way.
古い文学では作中人物の願望を示すために仮定法が用いられることがある。
In older literature, the subjunctive is sometimes used to indicate a character's wishes.