Examples of Subjects in Sentences:
Nouns:
* The cat sat on the mat.
* My brother is playing video games.
* The flowers are blooming in the garden.
* The sun is shining brightly.
* The United States is a large country.
Pronouns:
* He is a good friend.
* She loves to read.
* We are going to the beach.
* They are coming for dinner.
* It is raining outside.
Gerunds (verb + -ing):
* Swimming is my favorite activity.
* Reading can be relaxing.
* Dancing makes me happy.
* Eating is essential for survival.
* Traveling is an adventure.
Infinitives (to + verb):
* To sleep is a necessity.
* To learn is important.
* To succeed requires effort.
* To travel is a dream.
* To love is a gift.
Noun Phrases:
* The big, red ball bounced across the room.
* My favorite ice cream flavor is chocolate chip cookie dough.
* The girl with the blue eyes smiled at me.
* The old, wooden rocking chair creaked softly.
* The house on the hill is for sale.
Clauses:
* What you said was very interesting.
* Whoever stole the cookie is in trouble.
* That the earth is round is a known fact.
* How to bake a cake is a valuable skill.
* Why he left is a mystery.
Note: The subject is always a noun or pronoun, and it is the part of the sentence that performs the action or is described by the verb.