You have to make major changes in your lifestyle and ……. .

You have to make major changes in your lifestyle and ……. .
a) so have I
b) I have to too
c) I have too
d) so do I [color=green](Answer Key)

Source: school exam

Hi,
Can’t A also work?

Thank you.

Not really because ‘have to’ in the original comment is used as a modal, meaning ‘must’ and is not the first meaning of ‘have’. In other words you could say - A I have a small car B and so have I.

You can run very fast, so can I.
You eat slowly, so do I.
You must make major changes in your lifestyle and so must I.

On the above analogy, can we use ‘do’ in this case, Alan?
It looks as though the first option is preferable (Or confusing?):
You have to make major changes in your lifestyle, and so have I (to).
(so have I to and so have to I are both awkward, though.)

Good point about ‘can’ and ‘must’. I recommended ‘do’ simply because of the ambiguity of ‘have’ whereas ‘can’ and ‘must’ present no such confusion.

Okay, Alan; thank you.

Talking of the forms and meanings of ‘have’, how would you comment on this: “He has a gorgeous left foot, does Snodgrass. “?

Can’t you it read along the lines of “ He does have a gorgeous left foot, does Snodgrass“?
Or the margins might be blurred and in informal speech we could switch from one form to the other, similar to:

  • How many subsidiaries does your company have?

  • It has two.

  • How many sisters do you have?

  • I’ve got three (sisters).
    (??)