如何在SQL Server 2005中向视图添加列

I have no experience with SQL Server 2005. I've been assigned a task to modify views for adding 4 columns to the view. Is it possible to do this without the column change reflected in the table the view is referring. If I have the columns in the Table, then should I just drop the view and create a new one or is there a way to alter it.I have no experience with SQL Server 2005. I've