http://www.englishforums.com/search/pro.htm?q=tag%3aPlural+subject+tag%3aMedical+EnglishSearch results for 'tag:Plural subject tag:Medical English' matching tags 'Plural subject' and 'Medical English'en-USCSMOD (Build: 3248.36859)http://www.englishforums.com/English/Verb/lgdn/post.htm#55841Wed, 17 Nov 2004 14:13:34 GMT946f00bb-57d3-4b7b-a9a2-059b5341af52:55841Mister Micawber<br />In the first sentence, 'or' with two singular alternatives would require a singular verb, but 'titers' appears to be plural, so 'are' may be a more natural match; however, I would be happier if the plural subject were nearer the verb: <br /> <br />1) 'The presence of IgM antibody or rising titers of antibody are indicative of recent exposure.' <br /> <br />In the second sentence, 'demonstration' is more obviously the subject, so that 'is a valuable aid' would make more grammatical sense; still, I don't suppose that is your intention, so perhaps this sentence too could be recast as: <br /> <br />2) 'The presence of IgM antibody or rising antibody titers are valuable aids in the diagnosis of this disease with nonspecific symptoms.' <br /> <br />I shall move this thread to Medical English for further comment. <br /> <br /> <br />