Student or Learner
I sometimes hear the use of "so" as below.
A: I'm going to Brirain this summer.
B: So am I. I'm going to Liverpool and John Lennon's home.
A: I like Japanese martial arts.
B: So do I. I practice karate once a week.
I know they mean "Me too." But are they exactly the same? It seems to me "So...I" can be used when you say "Me too" with an emphasis or a little surprise.
I'd appreciate your comments on this.
So means "just as is the case there, in that way."