var query= from x in (
from a in ItemVerifyHistory
where ItemVerifyHistory.Where(b=>b.Sequence==1 && a.Sequence>1 && b.VerifyAddress==8
                      && (a. VerifyAddress != b.VerifyAddress || System.Data.Linq.SqlClient.SqlMethods.DateDiffDay(b. VerifyDate,a. VerifyDate)>=1)).Any()
group a by a.ItemID into g
select new {falsenum=g.Count(),g.Key})
           join b in ProductItem 
           on x.ItemID equals b.ItemID
           select new 
           {b.ProductID,x.falsenum};