文法不卡卡！英文「被動語態」一個公式就搞定！
什麼是「被動語態」呢？
你是否經常混淆如何將主動句轉被動句？
甚至覺得為何要這麼搞剛，何不通通都用主動句直述呢？
想了解「被動語態」使用的時機點，和如何轉換主、被動句型就看下去吧！
主動句轉換被動句的規則
❶ 將主動語態的受詞變為被動語態的主詞。
❷ 將主動語態的動詞改為 beV + p.p. 的結構。
❸ 將主動語態的主詞前加上 by，並改成受格。
Example ：
主動語態：The doctors can no longer control a disease.
被動語態：A disease can no longer be controlled (by the doctors).
被動語態的使用時機點
📌 用於表示「某人／物被…」，用來強調「承受動作的人／物」，而不是「執行動作的人／物」
Thomas's restaurant was visited by a famous chef last night.
昨天晚上有一位名廚拜訪湯瑪士的餐廳。
📌 動作者不明，強調動作，此時「by O」可省略：
This old building was used to house soldiers during World War II.
這棟舊建築在二次大戰時期用來安置士兵。
📌 動作者名稱過長時：
The awards show should be hosted by someone known for great achievements in acting.
頒獎典禮應該由在演藝方面擁有偉大成就的人來主持。
各種時態的被動式---掌握「be動詞+過去分詞」的原則
1. 現在簡單式：am / is / are + V-p.p.
My homework is completed before I watch TV in the evenings.
我的作業在我晚上看電視前就完成了。
2. 過去簡單式：was / were + V-p.p.
The new students were teased by the older boys at school.
新來的學生在學校被學長戲弄。
3. 未來簡單式：will be + V-p.p.
A new president will be elected if the public isn't happy with the government's performance.
假如大眾不滿意現任的政府表現，將會選出新的總統。
4. 現在進行式：am / is / are + being + V-p.p.
A new bridge is currently being built to replace the old one.
近期正在搭建新的橋樑來取代舊橋。
5. 過去進行式：was / were + being + V-p.p
When I was there last year, a new bridge was being built to replace the old one.
我去年在這時，當時在搭建一座新橋要取代舊橋。
6. 現在完成式：has / have been + V- p.p.
A new bridge has just been built to replace the old one.
一座新的橋樑已經搭建好，取代了舊的橋。
7. 過去完成式：had been + V-p.p.
A new bridge had been built to replace the old one by the time the train station was finish.
火車站完工時，已經搭建好一座新橋取代舊橋。
8. 未來完成式：will have been + V-p.p.
By next year, a new bridge will have been built to replace the old one.
到明年將會建造一座新橋來取代舊橋。
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