So do I/ Neither do I

So do I/ Neither do I


'So do I' is used to say that a positive sentence is also true for me.

Paul: I like chocolate.

Mike: So do I.(= I also like chocolate)

 

'Neither do I' is used to say that a negative sentence is also true for me.

Paul: I don't like to go to school everyday.

Mike: neither do I.(= I don't like to go to school everyday)

Both are often used as a reply to someone else in a conversation and we can use both sentences

Mike:John has been to London, and so have I.

Mike:Lucy doesn't like fish. and neither do I.