Added all N3 notions

🔰 Grammar/Can't help - doesn't matter.md

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+# Can't help; doesn't matter
+
+## Can't help
+
+### ずにはいられない
+
+Means "can't help but do something".
+Made with a verb in the negative form (ない) without the ない ending and adding ずにはいられない. 
+
+> [!info] Example
+> {悲|かな}しいのでアイスクリーム食べ==ずには入れれない==。
+> I'm sad so I can't help but eat ice cream.
+
+### てしょうがない・てしかたがない
+
+Means can't be helped".
+See [[Amounts - quantification#てしょうがない・てしかたがない]].
+
+## Doesn't matter
+
+### ても構わない
+
+<div class="usage">
+<div class="left">
+	<p><span class="box">V (て)</span></p>
+	<p><span class="box">い-Adj <strike>い</strike> くて</span></p>
+	<p><span class="box">な-Adj + で</span></p>
+	<p><span class="box">N + で</span></p>
+</div>
+	<p class="right">+ もかまわない・もかまいません</p>
+</div>
+
+Means "it doesn't matter if", "I don't mind".
+
+> [!info] Example
+> ここで{座|すわ}==っても構いません==か。
+> Would it be okay if I sit here?
+> 
+> ==かまわない==よ。
+> I don't mind.