The cat sleeps is a complete sentence! It has a subject (the cat) and a predicate (sleeps), starts with a capital letter, and ends with a period. "Running fast" has no subject – who is running? "Blue sky" has no verb – what about the blue sky? "And the dog" starts with "and" and is not a complete thought. A sentence must express a complete idea all by itself. You are learning the building blocks of writing!

The subject is "The bird"! The subject is who or what the sentence is about. It is usually a noun (person, place, or thing) or a pronoun (I, you, he, she, it, we, they). In "The bird sings," the bird is doing the singing. Here is another example: "My mom cooks dinner." Who cooks? My mom – that is the subject. Finding the subject helps you understand what the sentence is talking about.

The predicate is "barks loudly"! The predicate tells what the subject does or is. It always includes a verb. In "The dog barks loudly," "barks" is the verb, and "loudly" tells how it barks. The predicate can be just one word ("The dog runs") or many words ("The happy dog runs quickly through the park"). The subject tells who, and the predicate tells what about them!

Because I was tired is a sentence fragment! It starts with the word "Because," which makes you expect more information. "Because I was tired" – what happened? You need to finish the thought: "Because I was tired, I went to bed." Fragments are often missing a subject, a verb, or they start with a word that makes them incomplete (like because, although, if, when). To fix a fragment, add the missing part to make a complete thought.

I read a good book is a declarative sentence! It tells something (a statement) and ends with a period. Declarative sentences are the most common type of sentence. You use them every time you tell someone a fact, share information, or make a statement. Remember: declarative = declare (to state something clearly).

What day is it is an interrogative sentence because it asks a question. Question sentences are used when you need information. When you read a question, your voice goes up at the end. When you write a question, always end with a question mark. Interrogative sentences often start with question words (who, what, where, when, why, how) or with helping verbs like "do," "does," "is," "are," "can," "will."

What a great present is an exclamatory sentence! It shows excitement and ends with an exclamation point. Exclamatory sentences often start with "What" or "How" ("What a beautiful day!" "How exciting!") or they can be short commands ("Stop!") or expressions of strong feeling ("I am so happy!"). Use exclamation points sparingly – they are strongest when saved for truly exciting moments.

Wash your hands is an imperative sentence! It gives a command. The subject is "you" (even though it is not written – the sentence really means "You wash your hands"). Imperative sentences can be polite requests with "please" ("Please sit down") or strong commands ("Stop!"). Commands are very common in instructions, recipes, and directions. Remember: if someone is telling you to do something, it is an imperative sentence!

The correct combined sentence is "The dog is big and friendly." Instead of saying "The dog is big. The dog is friendly." you can say "The dog is big and friendly." Combining sentences makes your writing less choppy and more interesting. You can also combine with other words like "but" (to show contrast) or "so" (to show a result). For example: "I was tired, so I went to bed."

The sentence has two problems: it starts with a lowercase "t" (should be capital T), and it has no ending punctuation (should be a period). The correct sentence is "The boy ran to the store." You have learned so much about sentences: what a sentence is (a complete thought), the subject (who or what the sentence is about), the predicate (what the subject does), sentence fragments (incomplete thoughts), declarative sentences (statements ending with .), interrogative sentences (questions ending with ?), exclamatory sentences (excitement ending with !), imperative sentences (commands with implied you), and combining sentences with "and." You are becoming a true writer. Keep practicing, and your sentences will shine!