diff --git a/10-Input/Classes/Japanese_Class_2025-11-13.md b/10-Input/Classes/Japanese_Class_2025-11-13.md
index dc34c60..c75011f 100644
--- a/10-Input/Classes/Japanese_Class_2025-11-13.md
+++ b/10-Input/Classes/Japanese_Class_2025-11-13.md
@@ -24,4 +24,11 @@ This week, we covered the following topics:
 行ってきます -> いってきます -> I'm leaving
 出かける -> でかける -> To Go Out
 お帰りなさい -> おかえりなさい -> Welcome Back (Literally "Returned")
-出迎える -> でむかえる -> To go to entrance, and welcome other person. 迎える with extra steps.
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+出迎える -> でむかえる -> To go to entrance, and welcome other person. 迎える with extra steps.
+
+# すみませんでした -> Sorry/Excuse me
+Used after a negative tense verb to show that we are sorry we are unable to do something.
+
+Verb in ない stem + なくて + ,すみませんでした
+ パーティーへ行かなくて、すみませんでした
+ I 
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