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: 3614.32638)http://www.englishforums.com/English/PresentPerfect/chkxx/post.htm#204598Tue, 24 Mar 2009 02:36:22 GMT946f00bb-57d3-4b7b-a9a2-059b5341af52:204598CalifJim0http://www.englishforums.com/English/PresentPerfect/chkxx/post.htm#204598http://www.englishforums.com/English/comments12-204598.xmlIt is usual to match tenses in the case you present, but if you decide not to, it would certainly not be considered a serious error. In everyday conversation, it is fairly common to have a mix of tenses such as the one shown in your first example. For most people the change of tense would go practically unnoticed. CJhttp://www.englishforums.com/English/PresentPerfect/chkxx/post.htmTue, 24 Feb 2009 02:36:22 GMT946f00bb-57d3-4b7b-a9a2-059b5341af52:204575jack1121http://www.englishforums.com/English/PresentPerfect/chkxx/post.htmhttp://www.englishforums.com/English/comments12-204575.xmlWhen using present perfect, does the latter part of the sentence tense need to match my present perfect usage? 1. I have spent 2 hours cleaning my car. Indeed, it was tiring. 2. I have spent 2 hours cleaning my car. Indeed, it has been tiring. Thanks.