Is the auxiliary verb 'have' correct when we use the word 'so' to mean 'also'?

[Heidi]

Dear friends,

In the following dialog, would you please help to improve the sentences?Especially, is the usage of the words underlined correct?

A: Doctors suggest that if you have a bloody nose, you lean your head forward, not back.

B: Really? So I've been doing it wrong for ten years, and so have the hundreds of kids I have taught!

[Rover_KE]

The sentences are fine as they are.

Rover

[Heidi]

The sentences are fine as they are.

Rover

Can we say "I've been doing it wrong for ten years, so did/do the hundreds of kids I've taught"?

Thank you!

[bhaisahab]

Can we say "I've been doing it wrong for ten years, so did/do the hundreds of kids I've taught"?

Thank you!

No, use "have".

[emsr2d2]

Can we say "I've been doing it wrong for ten years, so did/do the hundreds of kids I've taught"?

Thank you!

You can only use the second half of the sentence, if you change the start to "I did it wrong for ten years ..."

If you start with "I've been doing it wrong ..." then continue with "so have the kids ..."
If you start with "I did it wrong ..." then continue with "so did the kids ..."

[5jj]

Sightly off-topic, but I'd say 'nose-bleed' rather than 'bloody nose'.

[emsr2d2]

Sightly off-topic, but I'd say 'nose-bleed' rather than 'bloody nose'.

Agreed, but I wouldn't use a hyphen.

If you give someone a bloody nose, you have punched them in the face.

[Heidi]

I understand it now. Thank you all!