OK, I went to the SQL view and added your line. That view now looks like this:
SELECT [MP TABLE].[LAST NAME], [MP TABLE].[FIRST NAME], [MP TABLE].[Att2007], [MP TABLE].[Att2008], [MP TABLE].[Att2010], [MP TABLE].[Att2009]
FROM [MP TABLE]
WHERE Att2010 = "Yes" AND Att2009 <> "Yes" AND Att2008 <>...