"vault backup: 2025-12-04 11:28:01 from Flow"

20-Knowledge/Synthesized-Japanese-Class-Notes.md

@@ -251,16 +251,29 @@ You can express potential without conjugating the verb into its unique form by u
         - *明日は天気予報によると寒くなるそうです。* (I heard from the weather report that it will get cold tomorrow.)
         - *週末は天気予報によると嵐になるそうです。* (I heard from the weather report that it will become stormy this weekend.)
 
-- **Confirmation Conditions (ら)** - 2025-12-04: When you're waiting for a certain situation to occur, you can stick なったら after it to show that it's something that is expected to occur, saying "When the situation becomes this....".
+- **Confirmation Conditions (ら)** - 2025-12-04: This pattern is used to express a conditional, similar to "if" or "when" in English. It's formed by taking the past tense plain form of a verb (the た-form) and adding `ら`. It indicates that the second clause of the sentence will happen after the condition in the first clause is met. This is a very common and versatile conditional form.
+    - **Formation:**
+        -   Verb (た-form) + ら
+        -   い-Adjective (stem) + かったら
+        -   な-Adjective / Noun + だったら
+    - **Key Usage:**
+        -   Indicates a specific, often one-time, condition and result.
+        -   Can be used for things that are certain to happen (e.g., "When I turn 20...") or hypothetical situations.
+        -   Often used when the first action is a necessary prerequisite for the second.
     - **Examples**:
         - *彼女は二十歳**なったら**、会社に入社します。* - **After** the girl turns 20, then she can enter the work force.
         - *年を取ったら、田舎に住みたい* - When I grow old, I want to live on the country side.
-            - Note, there's no なる here, you can use ら after any verb.
         - *駅に着いたら, 電話してください* - When you get to the station, please give me a call.
         - *今日は家に帰ったら、何をしますか。* - When you return home today, what will you do？ (Asking questions)
 
-- **Need Not To (なくてもいいです)** - 2025-12-04: If you want to say you don't need someone to do something, you can add "なくてもいいです" after the verb.
-	- Using just Verb Stem -てもいいです is like asking something to do something very kindly. Like saying "its ok if you turn on the AC".
+- **Need Not To (なくてもいいです)** - 2025-12-04: This grammatical pattern expresses that there is no necessity to perform an action. It's the equivalent of saying "you don't have to..." or "it's okay if you don't..." in English. It's formed by taking the negative `ない` form of a verb, dropping the final `い`, and adding `くてもいいです`.
+    - **Formation:**
+        -   Verb (ない-form, drop い) + くてもいいです
+        -   Example: `行く` (iku) -> `行かない` (ikanai) -> `行かなくてもいいです` (ikanakutemo ii desu)
+    - **Key Usage:**
+        -   Grants permission *not* to do something.
+        -   It is the opposite of `〜なければなりません` (must do) and `〜てはいけません` (must not do).
+        -   It's a softer, more polite expression than a direct command.
     - **Examples**:
         - *ホテルでかばんを持たなくてもいいです。* - At the hotel, its ok if you don't hold my bags//don't need to hold my bags.
         - *日曜日は早く起きなくてもいいです* - On Sundays, its ok to not wake up early.