Introduction: Discovering Word "Families" and Sentence "Building Blocks"!

Hello, everyone!
Whenever you chat with your friends or family, you use lots and lots of sentences (文, bun).
For example, you might say things like "The dog runs" (Inu ga hashiru.) or "I eat an apple" (Ringo o taberu.).
Sentences follow important rules. Once you understand these rules, reading books becomes so much more fun, and you will be able to share your thoughts clearly and accurately!
It might sound a little tricky at first, but don't worry! Think of it like solving a fun puzzle, and let's explore together!

1. The Two Big Heroes of Sentences: "Subject" (主語, Shugo) and "Predicate" (述語, Jutsugo)

Every sentence has two core, essential roles that hold it together.
These are the "Subject" (主語, shugo) and the "Predicate" (述語, jutsugo).

① Words answering "Who?" or "What?" = The Subject (主語, Shugo)

The subject is the main character (hero) of the sentence!
It refers to the word that answers "Who?" or "What?"
In Japanese, it is very often followed by the particles "は" (wa) or "が" (ga).

【Examples】
・Tori ga tobu. (The bird flies. → Tori ga answers "What?" so it is the subject.)
・Tarō-kun wa warau. (Taro smiles. → Tarō-kun wa answers "Who?" so it is the subject.)
・Ame ga furu. (The rain falls. → Ame ga answers "What?" so it is the subject.)

② Words answering "What does it do?", "What is it like?", or "What is it?" = The Predicate (述語, Jutsugo)

The predicate tells us what the main character is doing or what kind of state they are in.
In Japanese, it almost always comes at the very end of the sentence!

Predicates mainly fall into three patterns:
1. What does it do? (Shows an action): hashiru (runs), taberu (eats), asobu (plays)
2. What is it like? (Describes a state or quality): akai (red), tanoshii (fun), ōkii (big)
3. What is it? (Identifies a name or identity): inu da (is a dog), ichinensei desu (is a first-grader), sensei desu (is a teacher)

【Examples】
・Neko ga neru. (The cat sleeps. → What does it do? = Predicate)
・Sora ga aoi. (The sky is blue. → What is it like? = Predicate)
・Kore wa enpitsu desu. (This is a pencil. → What is it? = Predicate)

A "Secret Trick" to Find the Subject and Predicate

When searching for the subject and predicate, the secret trick is to look from the end of the sentence!
1. First, find the word at the very end of the sentence (the predicate). Ask: "What does it do?", "What is it like?", or "What is it?"
2. Next, ask yourself: "Who or what is doing that?" (The answer you find is the subject!)

【Let's Try It!】
Sentence: "Akai hana ga saita." (A red flower bloomed.)
Step 1: What is the word at the end? = "saita" (bloomed) → Predicate
Step 2: What bloomed? = "hana ga" (the flower) → Subject
*"Akai" (red) simply describes the flower in more detail, so it is not the subject itself.

【Key Points】
・Subject = "Who?" "What?" (The main character)
・Predicate = "What does it do?" "What is it like?" "What is it?" (The action or state)
・If you find the predicate at the end of the sentence first, finding the subject becomes super easy!

【Common Mistake】
In a long sentence like "Boku wa kinō kōen de sakkā o shita" (Yesterday, I played soccer in the park), you might wonder which parts make up the subject and predicate.
In this sentence, the predicate is the word at the end: "shita" (did/played). Who did it? "Boku wa" (I) is the subject!
Words like "kinō" (yesterday), "kōen de" (in the park), and "sakkā o" (soccer) are extra words explaining "when," "where," and "what." Don't rush—just find the main character and the final word first!

2. Vital Signposts Connecting Words: "は", "へ", and "を"

When building sentences, the little words that connect other words together are called particles (助詞, joshi).
In the early grades, you must pay extra close attention to words whose spelling differs from their pronunciation!

① How to use "は" (pronounced "wa")

When spoken aloud, it sounds like "wa" (わ), but when written as a grammatical particle, it must be written as "は".
It often attaches right after the subject to show "who" or "what."
・Watashi wa ichinensei desu. (I am a first-grader. → Pronounced "watashi wa")
・Kyō wa ii tenki desu. (Today the weather is nice. → Pronounced "kyō wa")

② How to use "へ" (pronounced "e")

When spoken aloud, it sounds like "e" (え), but when showing a destination, direction, or place you are heading to, it is written as "へ".
・Gakkō e ikimasu. (I go to school. → Pronounced "gakkō e")
・Yama e noboru. (Climb a mountain. → Pronounced "yama e")

③ How to use "を" (pronounced "o")

It has the exact same sound as the hiragana "o" (お), but when marking the direct object of an action (answering "what?" you are acting upon), you must always use "を".
・Gohan o taberu. (Eat a meal.)
・Hon o yomu. (Read a book.)

【Fun Fact!】
Long ago, people in Japan pronounced "は" like "fa," "へ" like "fye," and "を" like "wo"! As time passed, their everyday pronunciation changed into "wa," "e," and "o," but their traditional written spellings were kept just as they were!

3. Guides for Easy Reading: Punctuation Marks (句読点, Kutōten) and Quotation Marks (「 」)

To make your sentences clear and easy to understand, using punctuation marks correctly is essential!

① Comma "、" (読点, Tōten) and Period "。" (句点, Kuten)

・"。" (Kuten / Full stop): Always placed at the very end of a sentence.
・"、" (Tōten / Comma): Placed to pause or divide parts within a sentence. You use it when you need to take a breath, or to keep the sentence's meaning from getting tangled up!
【Compare These!】
A: ここではきものをぬいでください。 (Koko de hakimono / kimono o nuide kudasai.)
B: ここでは、きものを ぬいでください。 (Please take off your kimono here. → Kimono!)
C: ここで、はきものを ぬいでください。 (Please take off your footwear here. → Hakimono!)
Just by changing the spot where you put the comma (、), the meaning completely transforms!

② "「　」" (Quotation Marks / Kagi-kakko)

These are used when quoting words spoken aloud (dialogue) or writing thoughts inside someone's heart.
・Tarō-kun ga 「Ohayō.」 to iimashita. (Taro said, "Good morning.")
・Neko ga 「Nyā.」 to naita. (The cat went, "Meow.")

【Common Mistake】
Watch out for how you close quotation marks: 「　。」!
Place the period inside the quotation bracket, like this: 「Konnichiwa。」
Be careful not to leave the period outside, such as 「Konnichiwa」。!

4. Word Chunks and Tips for Skilled "Reading Aloud" (音読, Ondoku)

Reading aloud (音読, ondoku) from textbooks or storybooks is great practice. The secret to reading smoothly is paying attention to "word chunks" (語のまとまり, go no matomari).

① Read in "Meaningful Chunks," Not "Character by Character"

If you read a sentence character-by-character—like "K・y・o・u・w・a・i・i・t・e・n・k・i・d・e・s・u"—it becomes very hard to grasp the meaning.
Instead, pause slightly at natural phrase boundaries and read in chunks!

Kyō wa ／ ii ／ tenki desu. (Today ／ is fine ／ weather.)
When you spot natural chunks of meaning and match your breathing to them, your listeners will easily understand and feel what you are reading.

② Volume and Rhythm

・At the end of a sentence (where you see "。"), pause briefly and take a breath.
・Read cheerfully when you see an exclamation mark "!", and raise your pitch slightly at the end for a question mark "?" to bring the sentence to life!
・Straighten your back and open your mouth clearly—this will naturally produce a bright, beautiful voice!

【Key Points】
When reading aloud, keep the Subject, the Predicate, and the Word Chunks in mind. Create a nice rhythm by knowing which parts to read in one breath and where to take a brief pause!

5. Polite Form (丁寧な言葉) and Plain Form (普通の言葉)

By changing the ending of your sentence (the form of the predicate), you can adjust your speaking style to match who you are talking to!

Plain Form (Friends, family, etc.) Polite Form (Teachers, elders, presentations)
Iku. (Goes / Will go) Ikimasu.
Taberu. (Eats / Will eat) Tabemasu.
Inu da. (It is a dog.) Inu desu.
Omoshiroi. (It is interesting.) Omoshiroi desu.

Sentences that end with "〜desu" or "〜masu" are called polite sentences (敬体, keitai).
When giving a presentation in class or speaking to elders, remember to use polite words correctly.
*As you advance into higher grades (Grades 3–6), you will explore honorific speech (敬語, keigo) and complex sentence-joining techniques in even greater detail!

Wrap-Up Checklist!

Finally, let's review our most important points one more time!

1. The Subject is the main character answering "Who?" or "What?"!
2. The Predicate sits at the end of the sentence and tells us "What does it do?", "What is it like?", or "What is it?"!
3. For the particles "は" (wa), "へ" (e), and "を" (o), remember that how they sound and how they are written are different!
4. Use "。" at the end of a sentence, "、" to pause inside a sentence, and 「 」 for spoken dialogue!
5. When reading aloud, stay mindful of word chunks to read with great rhythm!

Just keeping these simple tips in mind will make you vastly better at reading and writing sentences.
Try spotting the subjects and predicates when reading books or writing in your journal every day!