文法自我檢查
檢查英文句子有沒有文法錯誤，最有效的方法是照固定順序逐項確認：先找主詞和動詞，再看連接詞、單複數、語態、時態和名詞。本頁整理這套檢查步驟，並提供綜合練習，可用在改錯題，也可以用來修改自己寫的句子。
文法錯誤通常出在哪些面向？
| 面向 | 檢查的內容 |
|---|---|
| 結構 | 句子有沒有主詞、動詞與正確的連接詞 |
| 文法 | 單複數、時態、詞性等規則 |
| 邏輯 | 句子的意思是否合理 |
| 修辭 | 表達是否簡潔、用字是否恰當 |
其中結構與文法最常出錯，也是本站內容的重點。
檢查一個句子要走哪些步驟？
- 找主要主詞和動詞：一個子句是否剛好有一組？句子的基本架構
- 數連接詞：子句的數量減一，是否等於連接詞的數量？句子結構
- 檢查主動詞一致：動詞是否配合真正的主詞？主詞動詞一致
- 檢查主動或被動：及物動詞後面有受詞嗎？動詞的種類
- 檢查時態：句中有沒有 since、yesterday 等時間線索？動詞時態
- 檢查名詞：可數或不可數？冠詞和數量詞用對了嗎？名詞的分類
- 檢查平行結構：and、or、but 前後的形式相同嗎？對等連接詞
綜合練習
1. Although the weather was bad, but we went hiking.
Although 和 but 都是連接詞，兩個子句只需要一個連接詞。去掉 but：Although the weather was bad, we went hiking.
2. The students who studied hard was happy with the results.
真正的主詞是複數的 students。應改為 The students who studied hard were happy.
3. Each of the books have a different cover.
each 是單數。應改為 Each of the books has a different cover.
4. The new law was passed last year and has been affecting many peoples.
表示「人們」的 people 本身就是複數，不加 s。應改為 many people。
5. Dolphins, an intelligent animal, communicate with sounds.
同位語的數量要和名詞一致。應改為 Dolphins, intelligent animals, communicate with sounds.
6. If she would have known, she would have come.
if 子句不用 would have，與過去事實相反時用 had + p.p.。應改為 If she had known, she would have come.
7. He suggested that she goes to the doctor.
suggest 表建議，that 子句用原形動詞。應改為 He suggested that she (should) go to the doctor.
8. I am interesting in learning English.
人感到有興趣要用 V-ed。應改為 I am interested in learning English.
推薦影音
學習者最常犯的十個錯誤
10 MOST COMMON Grammar Mistakes English Learners Make（mmmEnglish，18 分鐘，英語）：依序講解不可數名詞、不規則動詞、主動詞一致、助動詞、冠詞、介系詞、問句語序、現在完成式，以及 -ed 和 -ing 形容詞，幾乎涵蓋本頁的檢查步驟。
八個常見錯句
8 Common Grammar Mistakes in English!（engVid Rebecca，6 分鐘，英語）：用 What's the different、today morning 這類常見錯句練習改錯，適合中高階學習者複習，片後可做線上測驗。