query: Didn't vs hadn't
positive_passages.docid: 8497
positive_passages.text: When is the past perfect exactly needed?
negative_passages.docid: 105201
negative_passages.text: " could " vs. " could have "
negative_passages.docid: 58714
negative_passages.text: Simple Past vs. Present Perfect: "was" vs. "has been"
negative_passages.docid: 51157
negative_passages.text: 'Wouldn't wake up' vs. 'didn't wake up'
negative_passages.docid: 33742
negative_passages.text: Does using "did" to form the past tense make a difference?
negative_passages.docid: 12613
negative_passages.text: How to use "had" correctly in a past perfect paragraph?
negative_passages.docid: 40839
negative_passages.text: Difference between Present Perfect and Past Simple ( I am not a beginner )
negative_passages.docid: 121488
negative_passages.text: Why do we use "have" with does and not "has"?
negative_passages.docid: 93445
negative_passages.text: Had it not been vs If it were not for
negative_passages.docid: 149035
negative_passages.text: Using "neither" without "nor"
negative_passages.docid: 71914
negative_passages.text: "Didn't use to get" or "Didn't used to get"?
negative_passages.docid: 118270
negative_passages.text: Difference between "has + verbed" and "had + verbed"
negative_passages.docid: 65074
negative_passages.text: difference between not to verb , to not + verb
negative_passages.docid: 21041
negative_passages.text: past simple or past perfect why
negative_passages.docid: 34504
negative_passages.text: "could have" vs "could"
negative_passages.docid: 71907
negative_passages.text: "Didn't want to do X until Y happened" vs. "hadn't wanted to do X until Y happened"
negative_passages.docid: 65084
negative_passages.text: won't instead of using' wouldn't' is possible?