query: Which one is correct ? "I don't know what was that " vs "I don't know what that was"
positive_passages.docid: 655
positive_passages.text: "How it works?" vs. "How does it work?"
negative_passages.docid: 15721
negative_passages.text: "Is it proved that ...?" vs. "Has it been proven that ...?"
negative_passages.docid: 86906
negative_passages.text: Which is correct: "What is" or "What are"
negative_passages.docid: 114351
negative_passages.text: "that that"?!? how to properly express doubt about a distance object?
negative_passages.docid: 46644
negative_passages.text: Was or is? Confusion
negative_passages.docid: 72268
negative_passages.text: "I don't understand you" vs. "I'm not understanding you"
negative_passages.docid: 34503
negative_passages.text: "What day is it today?" vs. "What day is today?"
negative_passages.docid: 151953
negative_passages.text: "No, I didn't see him" vs "Yes, I didn't see him"
negative_passages.docid: 82911
negative_passages.text: Should I use a question mark when the second independent clause of my sentence is not a question?
negative_passages.docid: 53872
negative_passages.text: “I do not know where … is” vs. “I do not know where is …”
negative_passages.docid: 81318
negative_passages.text: Relative clauses: How do that-clauses differ from what-clauses?
negative_passages.docid: 47182
negative_passages.text: Using "that" and "this" interchangeably
negative_passages.docid: 51340
negative_passages.text: Standalone ɴᴏʀ: "neither this nor that" versus "not this nor that"?
negative_passages.docid: 42479
negative_passages.text: What is the difference between seems like /seems that/seems?
negative_passages.docid: 10040
negative_passages.text: When to use "If I was" vs. "If I were"?
negative_passages.docid: 108546
negative_passages.text: "the problem was my nerves" or "the problem were my nerves"?
negative_passages.docid: 124678
negative_passages.text: What's the difference between 'why would you do that' and 'why did you do that'?