English Language & Usage Stack Exchange is a question and answer site for linguists, etymologists, and serious English language enthusiasts. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

This question already has an answer here:

What is the correct syntax:

  • "Which browsers do support this?"
  • "Which browsers support this?"
share|improve this question

marked as duplicate by RegDwigнt Feb 6 '13 at 11:25

This question was marked as an exact duplicate of an existing question.

Both are correct in their own context, but the first implies emphasis: "Well, which browsers do support this, then?!" Context is important: what triggers this question? – Andrew Leach Feb 6 '13 at 11:10
Ok. There's not much context. I was just wondering if one of those was incorrect. I have the answer then. Thank you :) – fiddler Feb 6 '13 at 11:17
@RegDwighт Sorry, I did not know ell.stackexchange.com – fiddler Feb 6 '13 at 12:19
up vote 0 down vote accepted

The do form contrasts with a previous statement:

"You could use canvas, but not all browsers support it".

"Which browsers do support it?"

It's not restricted to the interrogative. It's one case of do-support.

share|improve this answer

Not the answer you're looking for? Browse other questions tagged or ask your own question.