So do I / Neither do I

We use so do I and neither do I to agree with an opinion or statement.

 

so + auxiliary verb + subject to agree with a positive statement:

I like apples. - So do I.

I saw this movie. - So did I.

I love English. - So do I.

They were really excited about the trip. - So were we.

 

neither/nor + auxiliary verb + subject to agree with a negative statement:

I don't like apples. - Neither do I. / Nor do I.

I didn't see this movie. - Neither did I. / Nor did I.

I don't like English. - Neither do I. / Nor do I.

They weren't excited about the trip at all. - Neither were we. / Nor were we.

 

***In spoken English we can use object pronoun + too for positive sentences or object pronoun + neither for negative sentences:

I like apples. - I like apples, too. / Me, too.

I don't like English. - I don't like English, either. / Me, neither.