"So + be/have/助动词/情态动词+主词"的结构。
此结构中的语序是倒装的,"So"代替上句中的某个成分。
如果上面一句是否定句,则使用"Neither/Nor+be/have/助动词/情态动词+主语"的结构。
例如 He’s tired,and so am I.(=I’ m also tired.)
You can swim,and so can I.(=I can also swim.)
She has had supper,and so can I.(=I’ve had lunch,too.)
Tom speaks English,and so does his sister.(=His sister speaks English,too.)
A: I went to the park yesterday.
B: So did I.(=I also went to the park yesterday.)