Complete with the correct auxiliary to form So … I (affirmations) and Neither … I (negations).
In English, we use 'So' and 'Neither' to show that we agree with what someone has said, or that we are in the same situation.
When you want to agree with a positive statement, you use 'So' followed by an auxiliary verb (like 'do', 'be', 'have', 'can') and then the subject (e.g., 'I'). The auxiliary verb must match the tense of the original statement.
When you want to agree with a negative statement, you use 'Neither' (or 'Nor'). The structure is the same: 'Neither' followed by the auxiliary verb and the subject. Remember to use the positive form of the auxiliary verb, as 'Neither' already includes the negative meaning.
Ex.: “I went to the cinema yesterday.” → So did I.
Ex.: “I didn’t phone Alex last night.” → Neither did I.
Write the complete response (e.g., "So did I" or "Neither do I").