1. "d" followed by a vowel:
* "da" (だ): This is the most common way to write "d" followed by "a".
* "de" (で): This is the most common way to write "d" followed by "e".
* "do" (ど): This is the most common way to write "d" followed by "o".
* "du" (du): This is the most common way to write "d" followed by "u".
* "di" (di): This is the most common way to write "d" followed by "i".
2. "d" followed by another consonant:
* "dzu" (ず): This is used when "d" is followed by a consonant, usually "z".
* "dja" (じゃ): This is used when "d" is followed by a consonant, usually "j".
* "djo" (じょ): This is used when "d" is followed by a consonant, usually "j".
3. "d" as a standalone sound:
* The sound "d" doesn't exist as a standalone sound in Japanese. It's always followed by a vowel or consonant.
Note:
* The "d" sound in Japanese is often a bit softer than in English, especially in the beginning of a word.
* When writing in Japanese, remember that the pronunciation can change based on the surrounding sounds.
It's important to practice the pronunciation of these different ways of writing "d" to ensure you are using the correct sound in your Japanese.