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: 3607.32596)http://www.englishforums.com/English/TheSame/pxxh/post.htm#78018Sat, 23 May 2009 12:26:13 GMT946f00bb-57d3-4b7b-a9a2-059b5341af52:78018CalifJim0http://www.englishforums.com/English/TheSame/pxxh/post.htm#78018http://www.englishforums.com/English/comments12-78018.xmlAll four are correct and the elements of each pair convey nearly the same thing. The first and third make the actions more remote and detached from present concerns; the second and fourth make the actions more relevant to the present. CJhttp://www.englishforums.com/English/TheSame/pxxh/post.htm#77997Mon, 23 Mar 2009 13:26:13 GMT946f00bb-57d3-4b7b-a9a2-059b5341af52:77997lynlianna1http://www.englishforums.com/English/TheSame/pxxh/post.htm#77997http://www.englishforums.com/English/comments12-77997.xml#1 It is unbelievable that he passed the examination. #2 It is unbelievable that he has passed the examination. Pattern 2 #3 It is clear that he broke the vase. #4 It is clear that he has broken the vase. I am not sure whether both options would be 'correct,' however I think that #1 and #3 are the most easily understood ( and my best guess is that they are correct where the others might not be). I'm not too helpful, am I? Nor am I an English professor. Hah.http://www.englishforums.com/English/TheSame/pxxh/post.htmFri, 23 Jan 2009 13:26:13 GMT946f00bb-57d3-4b7b-a9a2-059b5341af52:77986Guest2http://www.englishforums.com/English/TheSame/pxxh/post.htmhttp://www.englishforums.com/English/comments12-77986.xmlHello I'd like to ask about "tense." Would you help me to choose past or present perfect? I wonder if I can choose both past and present perfect in these sentences and they can convey the same meaning or not. Would you take a look at the following sentences? Pattern 1 #1 It is unbelievable that he passed the examination. #2 It is unbelievable that he has passed the examination. Pattern 2 #3 It is clear that he broke the vase. #4 It is clear that he has broken the vase. Thank you.