Can we use them interchangeably or there are situations where only one of them is correct?

  • Don't use the "do-support" version unless you have some specific reason. For example, I used it in my first sentence here because it's part of the idiomatic way of issuing a negated imperative - Do not use this, as opposed to the simple non-negated imperative Use this. In other contexts we might need it to form a question: Do you love me?, or to add emphasis: Maybe you don't believe me, but I do love you. But the possible range of contexts with different semantics / syntax for auxiliary to do is probably too broad to be covered by a single answer here. Commented Feb 19, 2021 at 15:13
  • Do you have specific examples of these being used, or are you asking in general?
    – stangdon
    Commented Feb 19, 2021 at 15:18
  • Sorry @stangdon I have heard it somewhere yesterday and don't remember now :( I thought it could be general question. I will edit post if I bring it back.
    – bridgemnc
    Commented Feb 19, 2021 at 15:53
  • @bridgemnc That's OK. It is possible to answer the question generally, but we could answer the question better if we knew the specific example.
    – stangdon
    Commented Feb 19, 2021 at 15:56

1 Answer 1


The difference is that You do have to is emphasising the obligation, usually in contrast with a suggestion (or statement, or speculation, or even an assumption in a question) that you do not have to.


I don't have to, do I? Yes, you do have to.

My researches suggest that I don't have to do this. I'm sorry, you do have to.


Do I have to do X first, or Y? You have to do X. (You do have to do X would sound odd).

You do have to is odd if there is no contrary suggestion already in the discourse.

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .