Word order: Not only did I go to Paris but also I visited a lot of other places

[Levon]

Hi everyone.

There's a problem and I need some help to understand it.

Could you help me, please?

There's such a sentence:
"Not only did I go to Paris but also I visited a lot of other places in France".

Why "did I go"?
Why it is wrong to say "Not only I went to Paris, but I also .... "?

Thank you!

[James]

"Not only" needs "did I go" to make your sentence a good English expression.

Not only can "not only" phrases form an inverted structure, but other emphasizing words or phrases can as well, including prepositional phrases. For example,

On this site have I had a discussion with Mr/Mrs/Miss Levon.

James