J is the tenth letter of modern English letters and ISO Basic Latin letters. Its regular English name is Jay or JY, which is not common now. When used for the upper jaw approximation, it may be called Yod.

In English,? j？ Most often represents subordinate J. In ancient English, phoneme / D? /With? cg？ Spelling. And? c ??。 Under the influence of ancient French, which has similar phonemes from Latin / J /, English scribes began to use it? i？ (later? j？） Stands for the initial / D in Old English (for example, iest and later jest)? /, use? dg？ Elsewhere (e.g. hedging). Later, there were many other uses? (later called "JJ") was added to borrowings from French and other languages (such as adjoin, junta). The first English book clearly distinguishes "I". And? Published in 1633. It can represent J. In some of these countries (including Raj, Azerbaijan, Taj Mahal and Beijing), the normal pronunciation / D? /In fact, it is closer to the local pronunciation, so that /? /To be an example of transforeign. Sometimes,? j？ Represents the original / J / sound, such as Hallelujah and fjords (see yodh for details). In Spanish,? Where is j? For pure fricative (e.g. jalape? o) , English users are usually similar to voiceless fricative / h /.

In English,? j？ It's the fourth letter that's not commonly used in words, just more frequently than "Z", "Q" and "X". However, it is very common in proper nouns (especially personal names).

The letter J is used as the italicized I [citation required], for the letter I following another I, such as xxiij or xxiij, instead of XXIII or XXIII representing the Roman number 23. Usage appears in advanced German. Gian Giorgio Trissino (1478 – 1550) was the first to make a clear distinction between I and j for different voices in his "Trissino letter on the recently added letters to the book". Italian ') (1524). Initially, "I" and "J" are different shapes of the same letter, both representing / I /, / I? /And / J /; however, the romantic language produced new sounds (from the previous / J / and /? /), later expressed as "I" and "J"; therefore, the sound value of English J obtained from French J is completely different from / J / which represents the initial sound in English word "yet".