So, Too, Neither and Either

'So do I' and 'neither do I'


I use 'so do I' to say that a positive sentence is also true for me, and I use 'neither do I' to say that a negative sentence is also true for me:

• John: I hate mushrooms.
• Me: So do I (=I also hate mushrooms).

• Lucy: I don't live in London.
• Me: Neither do I (=I also don't live in London. For example, maybe Lucy and I both live in Paris).

This is often used as a reply to someone else in a conversation, but both sentences can also be said by the same person, and even joined together:

• Me: Elizabeth loves coffee. So do I.
• Me: Harry doesn't play the piano and neither do I.