Expressions like “Me too,” “Me neither,” “So do I,” and “Neither do I” are commonly used in everyday English conversations. They help us agree with what someone says in a short, natural, and friendly way. However, many English learners feel confused about when to use which expression and how they differ in positive and negative sentences.
In this lesson, you will learn how to use Me too, Me neither, So do I, and Neither do I with simple explanations and clear examples. This guide is perfect for students, ESL learners, and anyone who wants to sound more confident and natural in spoken English.
What Are Agreement and Disagreement Responses?
Agreement and disagreement responses are short phrases we use to show that we share the same opinion or experience as someone else. Think of them as conversational shortcuts that help us connect with others quickly and naturally.
Agreement responses show that you have the same positive experience or opinion:
- “I love chocolate.” → “Me too!” / “So do I!”
Disagreement responses show that you share the same negative experience or don’t have that experience:
- “I don’t like spinach.” → “Me neither!” / “Neither do I!”
These responses are essential for natural English conversation. According to linguistics research from Cambridge University, native speakers use these agreement patterns hundreds of times per day without even thinking about it.
The Basic Rules: Positive vs. Negative Statements
The golden rule is simple but crucial: match the tone of the original statement.
For Positive Statements (Affirmative):
When someone makes a positive statement, use positive agreement responses:
- “Me too” (informal)
- “So do I” / “So am I” / “So have I” (more formal)
For Negative Statements:
When someone makes a negative statement, use negative agreement responses:
- “Me neither” (informal)
- “Neither do I” / “Neither am I” / “Neither have I” (more formal)
Let me share a real example from my classroom experience. Last week, a student named Sarah said, “I went to the movies yesterday.” Her classmate responded with “Me neither!” The whole class laughed because it sounded like he was saying he didn’t go to the movies, which created confusion. The correct response should have been “Me too!” or “So did I!”
Breaking Down Each Response Type
“Me Too” and “Me Neither”
These are the most casual and commonly used responses in everyday English.
“Me Too” Usage:
- Responds to positive statements
- Very informal and friendly
- Works in almost all casual situations
Examples:
- A: “I’m tired today.” → B: “Me too!”
- A: “I studied French in college.” → B: “Me too!”
- A: “I can drive.” → B: “Me too!”
“Me Neither” Usage:
- Responds to negative statements
- Equally informal
- Perfect for casual conversations
Examples:
- A: “I don’t like horror movies.” → B: “Me neither!”
- A: “I can’t swim.” → B: “Me neither!”
- A: “I haven’t finished my homework.” → B: “Me neither!”
“So Do I” Pattern
This pattern is more formal and follows a specific structure: So + auxiliary verb + I
The auxiliary verb must match the tense and form of the original statement:
Present Simple: “So do I” / “So does he/she”
- A: “I work downtown.” → B: “So do I.”
- A: “She likes coffee.” → B: “So do I.” (if you also like coffee)
Present Continuous: “So am I” / “So is he/she”
- A: “I’m studying English.” → B: “So am I.”
Past Simple: “So did I”
- A: “I went to Paris last year.” → B: “So did I.”
Present Perfect: “So have I” / “So has he/she”
- A: “I have seen that movie.” → B: “So have I.”
Modal Verbs: Match the modal
- A: “I can speak Spanish.” → B: “So can I.”
- A: “I should exercise more.” → B: “So should I.”
“Neither Do I” Pattern
This follows the same structure as “So do I” but for negative statements: Neither + auxiliary verb + I
Present Simple: “Neither do I”
- A: “I don’t eat meat.” → B: “Neither do I.”
Present Continuous: “Neither am I”
- A: “I’m not working today.” → B: “Neither am I.”
Past Simple: “Neither did I”
- A: “I didn’t watch TV last night.” → B: “Neither did I.”
Present Perfect: “Neither have I”
- A: “I haven’t been to Japan.” → B: “Neither have I.”
Modal Verbs: Match the modal
- A: “I can’t dance.” → B: “Neither can I.”
Common Mistakes and How to Avoid Them
Through my 10+ years of teaching experience, I’ve noticed these recurring mistakes:
Mistake 1: Mixing Positive and Negative
❌ Wrong: A: “I love pizza.” → B: “Me neither!” ✅ Correct: A: “I love pizza.” → B: “Me too!” / “So do I!”
Mistake 2: Wrong Auxiliary Verb
❌ Wrong: A: “I went home early.” → B: “So do I!” ✅ Correct: A: “I went home early.” → B: “So did I!”
Mistake 3: Using “So” with Negative Statements
❌ Wrong: A: “I don’t like spicy food.” → B: “So don’t I!” ✅ Correct: A: “I don’t like spicy food.” → B: “Neither do I!” / “Me neither!”
Mistake 4: Forgetting to Change the Auxiliary for Different Subjects
❌ Wrong: A: “My sister lives in Tokyo.” → B: “So do I!” (if you also live in Tokyo) ✅ Correct: A: “My sister lives in Tokyo.” → B: “So do I!” (This is actually correct – you’re agreeing about yourself)
Practical Tips for Mastery
Tip 1: Listen for Key Words
Pay attention to words like “don’t,” “can’t,” “haven’t,” “didn’t” – these signal negative statements requiring “me neither” or “neither do I” responses.
Tip 2: Practice with Mirror Conversations
Stand in front of a mirror and have conversations with yourself. Make statements and practice responding with both informal and formal agreement patterns.
Tip 3: Use the Substitution Test
If you can replace the original statement with “I do,” use “So do I.” If you can replace it with “I don’t,” use “Neither do I.”
Tip 4: Start with Informal Responses
“Me too” and “Me neither” are safer choices for beginners. Once you’re comfortable, gradually incorporate the more formal patterns.
Advanced Usage and Regional Variations
In American English, “Me either” is sometimes used instead of “Me neither,” though “Me neither” remains more standard. British English tends to be stricter about using “Me neither.”
Some advanced patterns include:
- Emphatic agreement: “I absolutely love this song!” → “So do I!” (with emphasis)
- Formal written English: In academic or professional writing, prefer “So do I” over “Me too”
Real-Life Application: Conversation Flow
Here’s how these responses create natural conversation flow:
Scenario: Coffee shop conversation
- Alex: “I need coffee to wake up in the morning.”
- Sam: “So do I! I can’t function without it.”
- Alex: “I don’t drink it after 3 PM though.”
- Sam: “Me neither! It keeps me awake at night.”
- Alex: “I’ve tried switching to decaf.”
- Sam: “So have I, but it’s just not the same.”
Notice how these short responses keep the conversation moving while building connection and understanding.
Conclusion
Using “Me too,” “Me neither,” “So do I,” and “Neither do I” correctly can make your English sound more natural and conversational. These short responses help you show agreement, shared feelings, and similar experiences in daily conversations.
With regular practice, you’ll know exactly which expression to use in positive or negative sentences and respond quickly without hesitation. Keep listening, speaking, and practicing these expressions to improve your fluency, confidence, and communication skills in English.
👉 Small phrases like these can make a big difference in how natural your English sounds!
