The subjunctive mood is one of three verb moods in English, along with the indicative mood and imperative mood. The subjunctive mood is used for hypothetical situations or to express desires, wishes, suggestions, obligations, or demands.
There are two verb forms when using the subjunctive: present subjunctive and past subjunctive. Present subjunctive verbs use the base form of the verb (e.g., “do”), whereas verbs in the past subjunctive use the simple past tense form of the verb (e.g., “knew”).
A determiner is a word that precedes a noun and gives information about possession (e.g., “my bike”), quantity (e.g., “two thieves”), or specificity (e.g., “that book”). Determiners therefore indicate details about the noun.