1. い (pronounced "ee"): This pronunciation is used when "a" is followed by a consonant or at the end of a word.
2. あ (pronounced "ah"): This pronunciation is used when "a" is followed by another vowel or is at the beginning of a word.
Here are some examples of how "a" is pronounced in different words:
* あめ (pronounced "ah-meh"): rain
* あか (pronounced "ah-kah"): red
* いぬ (pronounced "ee-noo"): dog
* いし (pronounced "ee-shee"): stone
Additionally, there are a few special cases where "a" is pronounced differently. For example, the particle は (pronounced "wa") is used to mark the topic of a sentence and is pronounced differently from the vowel "a."