So have I

[ademoglu]

Hi,

A: I have to wear a uniform at school.
B: So have I.

Is it wrong to say 'so I have' instead of 'so do I'?

Thanks.

 

[GoesStation]

It's comprehensible but unidiomatic.

 

[jutfrank]

We would say So do I.

We definitely would not say So I have. It's wrong to say this.

(I'm guessing that GoesStation thought you were saying So have I, which would be an appropriate response to: I have got to wear a uniform at school.)

 

[GoesStation]

I misread your question. You can say So I have! as an exclamation, as in:

A: You've got your shirt buttoned wrong.
B: So I have! Thanks for pointing it out.

You can't respond to I have to wear a uniform at school with "So I have." You'd have to invert subject and verb as you did in your quoted dialog.

 

[Raymott]

And "So have I" works also when 'have' is not an auxiliary.

"I have a black cat."
"So have I" / "So do I"

 

[emsr2d2]

Hi,

A: I have to wear a uniform at school.
B: So have I.

Is it wrong to say 'so I have' instead of 'so do I'?

Thanks.

If you wanted to repeat the verb "have to" in the response, you would need to say "I have to, too". It's clunky so use "So do I".