inserting <NULL>

how do you write an insert into statement and keep <NULL> in the null cells?
i was trying something like this BUT when you try to write an IS NULL statement it doesnt work.
ISNULL(dbo.TRUNK02_LastVersion_PayableClaims_01.MO D1, NULL) AS Mod1,ISNULL(dbo.TRUNK02_LastVersion_PayableClaims_01.MO , NULL) AS Mod1,|||how is this any different?

ISNULL(dbo.qry_TRUNK02_LastVersion_PayableClaims01 .MOD1, NULL) AS Mod1

after i truncate and insert into my table i need to be able to query with an IS NULL statement.

select mod1
from table
where mod1 is null|||Books online: ISNULL Replaces NULL with the specified replacement value.
So what is the point of ISNULL([A], Null)?

Please explain more clearly what you are trying to do, and give some sample data.|||Yeah, what The Blind One said...

are you just meaning to insert a NULL into a column of a table?

as in:
INSERT INTO dbo.TRUNK02_LastVersion_PayableClaims_01 (Mod1, ...)
VALUES (NULL, ...)???