안녕하세요. ^^ In this lesson, we are looking at the structure -(으)ㄹ 수 밖에 없다 [-(eu)l su ba-kke eop-da]. This is a combination of the two grammar points that were already introduced in our previous lessons. In Level 2 Lesson 17, we introduced how to use -(으)ㄹ 수 없다 to say that you can’t do something, and in Level 3 Lesson 18, we looked at how 밖에 is used in negative sentences to express the meaning of “only”. Have fun!