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View Full Version : So do I / so have I



sb70012
03-21-2015, 04:20 PM
He has the letters written, and so do I.
He has the letters written, and so have I.

Hello,
I have asked this question in another forum before. One told me that both "do I" and "have I" work and one other told me that only "do I" works because "has" is not used as an auxiliary verb but a main verb.

What's your opinion? Would you please be kind enough to give me some guidance on this?

Thank you.