Early Friends practiced plainness in speech by not referring to people in the "fancy" ways that were customary. Often Friends would address everyone, including high-ranking persons, using the familiar forms of "thee" and "thou", instead of the respectful "you". Later, as "thee" and "thou" disappeared from everyday English usage, many Quakers continued to use these words as a form of "plain speech", though the original reason for this usage disappeared, along with "hast" and "hath". In the eighteenth century, "thou hast" disappeared, along with the associated second-person verb forms, and the otherwise strange "thee is" became normal "plain speech". Today there are still Friends that will use "thee" with other Quakers. (Note: in 17th century English the forms above would have been "thou hast" and "thou art".) Interestingly, some Friends now use the word "thou"--but sometimes as a plural form.