MVC :: Build Model Around Entity SQL?

I want to build my Model around Entity SQL. I'm pretty comfortable with writing SQL queries hence my choice for using entity SQL.

In my model i have this:

namespace Model
{
public class Person
{
public string Name { get; set; }
public string SecondName { get; set; }
public int Age { get; set; }
public DateTime DOB { get; set; }
public void Save()
{
//to do
}
public List<Keyword> GetKeywords()
{
//get data from entity
DBEntities context = new DBEntities();
string sql = "SELECT * from Keyword";
EntityCommand cmd = new EntityCommand(sql);
return ;
}
}
}

how do I execute entity SQL comment?

how can i return a list that is returned from this query?

if i have different classes that need access to DB would I always have to specify "DBEntities context = new DBEntities();" or is there a better way so that all my classes have this configured?