Could you reformulate your question?

You cannot enter data into a table in the design view of a form.

Do you mean entering data into a table using the datasheet view of the table
(or a query)?

Also, this sounds like a homework question.  If it isn't a homework
question, you might want to justify why you are asking the question.

Rebecca, it sounds like you're going through the questions on a test
or a homework assignment and just posting them here.

You tell us: what might be some disadvantages of entering data in
design view? Can you even do so?

                 John W. Vinson[MVP]