Final answer:
The letter J is never used for the consonant phoneme /j/ at the end of words in English, instead -ge or -dge is used.
Step-by-step explanation:
The letter that is never used for the consonant phoneme /j/ at the end of a word in English is letter J (B).
Instead, English uses -ge or -dge for the /j/ sound.
The phoneme /j/ is spelled using g when it is followed by the letters e, i, or y.
For instance, when there is a long vowel right in front of the /j/ sound, it is spelled as g, such as in the word 'cage'.
When there is a short vowel before the /j/ sound, it is spelled 'dg', as in 'badge'.
Also, the silent final e can indicate that the g is soft, such as the word 'age'.
The spelling j is usually found at the beginning of words, like 'joke', and you will not find dg at the start of English words.
The letter y sometimes acts as a consonant but not for the /j/ phoneme at the end of words.