LINQ Lambda Left join with an Inner join

Question

I have written a LINQ lambda query which so far which returns all staff which do not have an associated training row which works fine. I now need to amend my where clause to use

Answer 1

Like this maybe:

var query = from s in db.staff
    join m in db.manager on s.manager_id equals m.id
    from t in db.training
        .Where(w=>w.staff_id==s.id).DefaultIfEmpty()
    select new
    {
        Staff = s,
        Training = training
    };