Mood is an indication of the purpose or intent of the sentence (its manner of use).
English verbs have three moods- the declarative, the subjunctive and the imperative.
The declarative is used to make statements and to ask questions.
XXXMs. Wilson ia a doctor. Do you know the way to San Jose?
The subjunctive mood is used to express a wish or a condition which is contrary to fact. It is often found in
if- then statements.
XXXIf I were a rich man, I would buy a mansion on a beach.
The imperative mood is used for commands, requests, or instructions. The subject is always the pronoun
‘you’, but the word ‘you’ is usually implied and is seldom in the sentence.
XXX(You) Look yout! Stop that!
An explanation of mood in English and the three moods: subjunctive, imperative and indicative mood– www.understandinggrammar.com