複雑な文章でDETスコアアップ
DETスコアを上げるための複雑な文の使い方（例文付き）
To score high on the Duolingo English Test (DET), you need to show grammatical complexity. Simple sentences won’t cut it—you have to combine ideas smoothly to sound more natural and fluent. The better your writing flows, the higher your score! Here’s why complex sentences matter and how you can start using them today.
複雑な文とは？
A complex sentence consists of at least one main clause (also called an independent clause) and one or more dependent clauses. These clauses are connected using subordinating conjunctions, such as "although," "because," or "while."
Understanding how to form complex sentences is essential for success on the Duolingo English Test because it allows you to express ideas more clearly and logically.
単文の構造（基本形）
単文は以下の基本構造に従います。
✅ Subject + Verb + (Object - Optional)
✔ 例文：
- She (subject) went (verb) to work (object).
- He (subject) studies (verb) every day.
A simple sentence expresses a complete thought but can sometimes sound too basic or choppy, especially in a formal test setting. To improve your DET score, you must use complex structures instead of just short, simple sentences.
複雑な文が重要な理由
✔ スコア向上の可能性: The Duolingo English Test evaluates sentence variety, so showing a mix of complex, compound, and simple sentences helps demonstrate strong writing skills.
✔ 流暢さと熟練度を示す: Using complex sentences naturally mimics native English writing and speaking, which makes your responses sound more advanced.
✔ アイデアをより明確に伝える: Complex sentences help connect ideas more logically and prevent repetitive, choppy writing.
✔ ライティングとスピーキングに不可欠: On the DET, writing and speaking responses require detailed explanations. Complex sentences allow you to expand on key points without sounding robotic.
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複雑な文の作り方
複雑な文には以下の要素が含まれます。
1️⃣ An independent clause (a complete sentence that can stand alone).
2️⃣ A dependent clause (a phrase that cannot stand alone and depends on the main clause for meaning).
3️⃣ A subordinating conjunction (a word that connects the two clauses, such as "because," "although," or "if").
複雑な文の基本公式
✅ Main Clause + Subordinating Conjunction + Dependent Clause
✔ 例文：
- I stayed home because I was feeling sick.
- 主節： "I stayed home"
- 従属接続詞： "because"
- 従属節： "I was feeling sick"
✔ 逆順の例文：
- Because I was feeling sick, I stayed home.
- （文を逆転させても意味が通じることに注目してください！）
文結合の基本
文結合とは、2つ以上の短い文を1つの明確で複雑な文に統合するプロセスです。このスキルを身につけると、ライティングがより流暢で自然、魅力的になり、結果としてDETスコアの向上につながります！
文結合の3つの主要なテクニック
1️⃣ 等位接続詞（Coordinating Conjunctions: FANBOYS）
文を結合する1つの方法は、等位接続詞（FANBOYSとしても知られています）を使用することです。
✔ For
✔ And
✔ Nor
✔ But
✔ Or
✔ Yet
✔ So
例文：
- She went to work. She did not want to go. → （単純でぎこちない文）
- She went to work, even though she did not want to. → （"even though"を使用したより高度な文）
2️⃣ 従属接続詞（Subordinating Conjunctions）を使った複雑な文
Subordinating conjunctions introduce a dependent clause and create a complex sentence that highlights the relationship between ideas.
✔ 一般的な従属接続詞：
- Because（原因/結果）
- Although（対照）
- While（同時進行の行動）
- If（条件）
- Since（原因/結果）
例文：
- They planned a vacation. They did not have enough money. → （2つの独立したアイデア）
- Although they planned a vacation, they did not have enough money. → （対照を示す複雑な文）
3️⃣ 主語と動詞の結合
2つの文が同じ主語または動詞を共有している場合、より良い流れのために、また反復を避けるために結合することができます。
✔ 例文：
- Mr. Brown walked to the store. His pet monkey Ralph walked along with him.
- Mr. Brown and his pet monkey Ralph walked to the store together.
✅ このテクニックは文をスムーズに保ち、不要な反復を排除します。
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文結合がDETスコアを向上させる理由
文結合のテクニックを習得すると、DETでの流暢なライティングとスピーキング能力が向上します。その理由は以下の通りです。
✔ 幅広い文法スキルを示す – 採点者に、さまざまな文構造を理解していることを示せます。
✔ エラーを減らす – 短くぎこちない文は、しばしば文法の間違いにつながります。複雑な文は正確さを高めます。
✔ 回答をより自然にする – 文の種類を混ぜることで、スピーチやライティングがよりネイティブスピーカーのように聞こえます。
文結合のBefore & Afterの例：
❌ Before（基本的で単純な文）：
- She wants to study abroad. She doesn’t have the money to do it.
✅ After（改善された複雑な文）：
- Although she wants to study abroad, she doesn’t have the money to do it.
💡 See the difference? The second version sounds more advanced because it uses a complex structure instead of two short, choppy sentences.
まとめ：DETスコア向上のために複雑な文をマスターしよう！
複雑な文を使用することは、高いDETスコアを達成するために不可欠です。覚えておいてください：
✔ 短い文と長い文を混ぜることで、自然な流れを作り出しましょう。
✔ 従属接続詞を使って、アイデア間の関係性を表現しましょう。
✔ 似たような主語や動詞を結合することで、反復を避けましょう。
✔ ライティングとスピーキングを声に出して練習することで、回答を洗練させましょう。
If you want to improve quickly, start practicing sentence combining techniques today! This small change can make a huge difference in your Duolingo English Test score. 🚀
