so, neither, nor作部分倒装
例如: She is a teacher, so is he.
她是老师,他也是。
I haven’t read this book, neither(nor) has he.
我没读过这本书,他也没读过。
as 引导的让步状语从句中的倒装
例如:Small as it is, it can still be seen.
虽然它很小,但还是能看得见。