Second person singular "Thou/thee/thy/thine" has more or less vanished from English as a whole.
You will still find it employed in theological language and liturgy, particularly by those Christian denominations who use the King James Bible. Also, some members of a few religious groups - the Society of Friends (Quakers) for example - still resort to it in day-to-day speech.
Lastly, a dwindling number of English dialects use some form of it (the Northern English "tha").
The second person singular conjugation is "-(e)st" for most verbs (e.g., "thou walkest" and "thou seest"). A few irregular verbs have particular forms:
be/art/wert (or wast) have/hast do/dost
And even modals had second person forms:
wouldst shouldst/shouldest wilt mayest canst couldst etc.