Thou is the nominative form of you in Old English, meaning you, you, you. As an old word, it is now also used in poetry or religious contexts as the subject.
Thou in Old English is equivalent to du in German, and its changes are the same as du in modern German.
The possessive case is thy or thin, the object case is thee, and the possessive pronoun is thine. Now it is only used for prayer, poetry and tongues. Quakers often use "you", but sometimes "thee" is used instead.
Extended information:
Old English nouns are distinguished by number and case. Numbers are divided into singular and plural; cases are divided into nominative case, possessive case, dative case and object case. Therefore, there are 8 variations of a noun in total. In addition, nouns are divided into masculine, neuter and feminine. These sexual distinctions are not judged by gender, for example, women are masculine.
The morphological changes of adjectives are divided into strong and weak, and its number and case also have 8 changes.
The verb only has two tense changes: present tense and past tense, but has different conjugations according to different persons. In contrast, modern English only retains -s/-es for the third person singular in the present tense. of transposition.
Reference: Baidu Encyclopedia-Old English