English learners are often confused about when to use” SO DO I “and when to use” ME TOO”. Do you know the difference between” SO DO I “and “ME TOO”, and when to use them? Read on!

SO DO I vs. ME TOO

Both SO DO I and ME TOO are used as a response to simple statements. The statements must
be positive (without the word “no” or “not”). SO DO I is more formal, while ME TOO is more informal.

*ME TOO

-ME TOO is more informal. It is used in casual conversation.

I love ice cream. Me too.
I slept so well last night. Me too.
I think I’ll order the chicken. Me too.

-What about negative sentences? For these, we say ME NEITHER.

I can’t dance. Me neither.
I didn’t sleep well last night. Me neither.
I’m not ordering dessert. Me neither.

*SO DO I

-SO DO I is more formal. It is used in writing, in more formal conversations, and in presentations.

I love the book The Sun Also Rises. So do I.
I think she did an excellent job on his presentation. So do I.

-SO + [auxiliary] + I

Note that we can use SO + auxiliary+ SUBJECT with other positive statements. The middle word

must match the verb or verbs of the first statement.

*Use DID if the original positive statement is in the simple past.

I loved the book Charlotte’s Web when I was a child. So did I.

I thought he did an excellent job in the interview. So did I.

*Use a MODAL if the original statement uses a modal.

I could order another glass of wine. So could I.

I can touch my toes. So can Sarah.

He can speak French. So can I.

*Use WILL if the original statement uses the simple future.

I think I will go to bed. So will I.

I think I will study Mathematics in college. So will Janet.

*Use the BE VERB with be + ing statements.

I am going camping this weekend. So am I!

He is going to UC Davis this fall. So are Jill and Thomas.

Negative statements

*What about negative statements? We cannot use SO DO I or its variations. We must use
NEITHER. Use the form NEITHER + [VERB/MODAL] + SUBJECT. Make sure that the verb or
modal from the original statement matches the verb/modal in the “neither” statement.

I can’t dance. Neither can I.

I didn’t sleep well last night. Neither did I.

I’m not ordering dessert. Neither am I.