yet是一个连接性副词吧，连接句子是应该是 独立分句；yet，独立分句
但看一下下面两句句子，是在一份讲义里抽出来的
The car was quite cold; yet/still/however/nevertheless it was in excellent condition.
I’ve been away only for three years, yet I can hardly recognize my hometown.
第二句就没有分号了，我在想，这会不会是当作从属连词，引导从句构成复合句；而第一句仅仅是一个连接性副词构成并列句呢？