query: Optional tense back shifting
positive_passages.docid: 27736
positive_passages.text: Why is the present perfect used in headlines?
negative_passages.docid: 36746
negative_passages.text: Can a sentence have two ing-verbs in a row?
negative_passages.docid: 78336
negative_passages.text: past simple or present perfect
negative_passages.docid: 38255
negative_passages.text: Future Tense of Modal Verbs
negative_passages.docid: 99932
negative_passages.text: Participle clauses with state verbs
negative_passages.docid: 24744
negative_passages.text: The habitual past "would" versus "simple past" tense
negative_passages.docid: 109481
negative_passages.text: Tenses after "as if"
negative_passages.docid: 55153
negative_passages.text: Problem with backshift in reporting clauses
negative_passages.docid: 105706
negative_passages.text: could the second conditional be like this?
negative_passages.docid: 98159
negative_passages.text: Reported / indirect speech - why no backshift
negative_passages.docid: 150189
negative_passages.text: past continuous or past simple
negative_passages.docid: 31573
negative_passages.text: Advanced rules for shortening relative clauses with a participle?
negative_passages.docid: 131253
negative_passages.text: Why doesn't the auxiliary will qualify as future tense?
negative_passages.docid: 143589
negative_passages.text: How do we use zero conditional and first conditional to talk about things in the past
negative_passages.docid: 68680
negative_passages.text: Repeating (or not) "to" in a sentence involving infinitives set in parallel
negative_passages.docid: 36058
negative_passages.text: Conditional sentence without conditional conjunctions, is that possible?
negative_passages.docid: 129948
negative_passages.text: present continuous or be going to?