What are the indicative, imperative, and subjunctive moods?
When do I use "If I were" or "if he/she were"?
Verbs have moods -- but that doesn't mean they have bad days! Verb moods depend on the intention of the speaker or writer.
Most verbs are in the indicative mood, in which the speaker or writer makes a statement or asks a question.
The imperative mood is used for commands or requests.
The subjunctive mood is a bit trickier -- it uses a different form of the verb to indicate urgency, formality, possibility, speculation or something contrary to fact.
Indicative: Megan gives me the vase. Imperative: Please give me the vase. Subjunctive: I insisted that Megan give me the vase.
Indicative: The Senate approves the motion. Imperative: Please approve the motion. Subjunctive: He urged that the Senate approve the motion.
Indicative: I am a soldier. Imperative: Be all that you can be. Subjunctive: If I were a soldier, I would be wearing a uniform.