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/Articles/wqkgp/post.htm#749800Wed, 27 May 2009 00:12:21 GMT946f00bb-57d3-4b7b-a9a2-059b5341af52:749800CalifJim0http://www.englishforums.com/English/Articles/wqkgp/post.htm#749800http://www.englishforums.com/English/comments12-749800.xmlYour sentences are fine as written (but note the spelling of grammatical ). You can use structures and meanings , but it is not absolutely necessary. In fact, the plurals strike me as hypercorrections. CJhttp://www.englishforums.com/English/Articles/wqkgp/post.htmWed, 27 May 2009 00:02:06 GMT946f00bb-57d3-4b7b-a9a2-059b5341af52:749783Anonymous1http://www.englishforums.com/English/Articles/wqkgp/post.htmhttp://www.englishforums.com/English/comments12-749783.xmlDear Professor, I would like to know if the articles and zero articles are used correctly or not in these questions: What is the difference between deep and surface structure? What is the difference between grammaticle and lexical meaning? Would you please tell me if I have to a definitie atricle to &quot;deep, surface, grammatical and lexical&quot;, if I have to add a plural &quot;s&quot; to &quot;structure and meaning&quot; or I can leave them without change? Thanks in advance for your answer