Thou You
When “you” is the subject of the sentence.

Thee You
When “you” is the object of the sentence.

Thy Your
Possessive form of you. Commonly used before a noun that begins with a consonant/consonant sound (like the article, “a”).

Thine Your
Possessive form of you. Commonly used before a noun that begins with vowel/vowel sound (like the article, “an”). Also used when indicating that something is “absolute and understood”.

Ye You (plural)
Plural form of “you” when addressing a group of people.