thanks, but now i'm confused what is the easiest way to understand this?

The subject is the thing or person who is doing the action or being talked about.

The simple subject is one word, a noun or pronoun. A proper noun, like San Francisco is considered one word.

The complete subject is the simple subject plus the words that describe or modify it.

Consider these examples. The complete subject is underlined. The simple subject is boldfaced.

Grand Canyon is a spectacular sight.

The blonde girl in the red dress ordered a huge steak for dinner.

One of my friends is going to Australia this summer.

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Do you know French?

Educated people with college degrees usually have higher paying jobs.