-kunakatta desu [past negative, polite]
→ Jump Start 1 - Lesson 31
-janakatta desu [past negative, polite]
→ Jump Start 1 - Lesson 35
-kunakatta desu [past negative, polite]
→ Jump Start 1 - Lesson 31
-janakatta desu [past negative, polite]
→ Jump Start 1 - Lesson 35