Possessive adjectives are words like my, your, their indicating possession eg. Note that some words like good and fast can be either adjectives or adverbs in English. They will usually translate differently in a foreign language - so be careful with the dictionary. Types of verb are explored further under sentences below. The form of the verb or its ending is regulated by the person which is the subject of the verb.
Imperative mood is used to give instructions or orders.
Subjunctive mood is something we are not aware of in English. The rules for when to use the subjunctive and in what tense need to be studied for each language separately. There are specific rules in most languages as to when to use to be or to have. The verb to be is often used as an auxiliary in continuous forms of the present or past eg. I am eating, I was eating to express an action which continues over a period of time.