Agree with a positive statement using so plus the auxiliary plus the subject, as in I love traveling, so do I, and agree with a negative statement using neither or nor plus the auxiliary plus the subject, as in I can’t swim, neither can I. Use I think so, I hope so, or I’m afraid so to respond to opinions or predictions.
Grammar Rule
Expressing agreement with so and neither/nor requires inverting the subject and auxiliary, matching the tense and form of the original statement.
Advanced Agreement and Disagreement: Rules and Examples
| Statement | Response | Example |
|---|---|---|
| Positive | So + auxiliary + subject | I love traveling. So do I. She has finished the project. So has he. |
| Negative | Neither/Nor + auxiliary + subject | I can’t swim. Neither can I. I’m not interested in politics. Neither am I. |
| Opinion/prediction | I think so / I hope so / I’m afraid so | Will you attend the conference? I think so. |
Remember: So + auxiliary + subject (agree with positive); Neither/Nor + auxiliary + subject (agree with negative).
Practice Test
Instructions
Answer each question in the test below responding correctly with agreement or disagreement. You will get a new random set of questions every time you retake the test, plus a downloadable results summary with your name and score at the end.
Agreement and Disagreement
Click «Start the test» to begin right away — no signup required. You can get a personalized certificate with your name and score at the end, if you want one.
Frequently Asked Questions
How do you agree with a positive statement?
Use so plus the auxiliary plus the subject, as in I love traveling, so do I.
How do you agree with a negative statement?
Use neither or nor plus the auxiliary plus the subject, as in I can’t swim, neither can I.
How do you respond to a question about the future with an opinion?
Use I think so, I hope so, or I’m afraid so, as in will you attend the conference, I think so.
Does the auxiliary have to match the original statement’s tense?
Yes, the auxiliary in the response must match the tense and form of the auxiliary in the original statement.