二重复句1：单句+复句；复句+单句
설명
二重复句是由两个层次组成的复句结构，包含'单句+复句'或'复句+单句'两种模式。前一部分和后一部分在逻辑上相互关联，形成更复杂的语义关系。
A double complex sentence consists of two layers of structure, following either 'simple sentence + complex sentence' or 'complex sentence + simple sentence' patterns. The two parts are logically connected, creating more sophisticated semantic relationships.
예문
我决定去中国留学，即使中文再难我也要去学。
I have decided to study in China; even if Chinese is extremely difficult, I will still learn it.
因为生病所以我没去上课，没想到的是老师一下课就来看我了。
I didn't attend class because I was sick; unexpectedly, the teacher came to visit me right after class ended.
她一直不愿意说出真相，虽然我不知道她的真实想法，但我尊重她的选择。
She has always been unwilling to reveal the truth; although I don't know her true thoughts, I respect her choice.