What is the simple and complex for this sentence.

Making a bad grade on such an easy spelling test is such an embarrassment.

Simple and complex WHAT?

Do you mean COMPLETE, not complex? Are you looking for the subject or predicate?

Simple and complex subject I mean! Sorry! ^_^

This is the complete subject:

Making a bad grade on such an easy spelling test

The simple subject is "making."

Oh I am sorry! I wasn't focusing and kept putting complex! Thank you, Ms. Sue for all your help!

The simple form of the sentence is:

- Failing an easy spelling test is embarrassing.

The complex form of the sentence is:

- It is such an embarrassment to make a bad grade on a spelling test that is so easy.

To transform the sentence from simple to complex form, we add additional descriptors and expand the sentence structure. In this case, we emphasize the embarrassment by using "such" to intensify the feeling, and we specify that it is the act of making a bad grade that is causing the embarrassment.