http://www.englishforums.com/English/EslGeneralEnglishGrammar-Questions/Forum12.htmAsk your questions on grammar and get your sentence checked. We answer lots of different types of general English grammar questions here. <font color=red>DO NOT post paragraphs and compositions here. Post them in our <a href="http://www.englishforums.com/English/EssayReportCompositionWriting/Forum9.htm"><b>Essay, Report and Composition Writing Forum</b></a>.</font>enXMOD (Build: 3616.28671)http://www.englishforums.com/English/Words/dzhjw/post.htm#277332Sun, 26 Apr 2009 13:20:22 GMT946f00bb-57d3-4b7b-a9a2-059b5341af52:277332Tung Quoc0http://www.englishforums.com/English/Words/dzhjw/post.htm#277332http://www.englishforums.com/English/comments12-277332.xmlThanks teacher but I don't understand. the same time period means before or simultaneous ? Qhttp://www.englishforums.com/English/Words/dzhjw/post.htm#277326Thu, 26 Mar 2009 14:20:22 GMT946f00bb-57d3-4b7b-a9a2-059b5341af52:277326milky1http://www.englishforums.com/English/Words/dzhjw/post.htm#277326http://www.englishforums.com/English/comments12-277326.xmlThey refer to the same time period.http://www.englishforums.com/English/Words/dzhjw/post.htmThu, 26 Feb 2009 14:20:22 GMT946f00bb-57d3-4b7b-a9a2-059b5341af52:277312Tung Quoc2http://www.englishforums.com/English/Words/dzhjw/post.htmhttp://www.englishforums.com/English/comments12-277312.xml1. V1 and V2 are temporally coreferential . coreferential means V1 and V2 happened simultaneously . Right? 2. The time reference of V1 precedes that of V2. That means V1 happened before V2. Right? Quoc