1.中文：他們結婚兩年了。
They have married for two years.
They have been married for two years.(表示已婚狀態的持續，要用完成時的被動式。)
2.中文：他被所有學生嘲笑。
He was laughed by all the pupils.
He was laughed at by all the pupils.(不及物動詞+介詞=及物動詞，變被動語態時介詞不能省略。)
3.中文：英語難學。
English is difficult to be learned.
English is difficult to learn.(英語難學=學英語難，也可說Its difficult to learn English。原句的'主語實際上是不定式的邏輯賓語，不定式要用主動形式。)
4.中文：湯姆問我這些島嶼是否屬於美國。
Tom asked me if these islands are belonged to America.
Tom asked me if these islands belonged to America.
5.中文：中國發生了很大變化。
Great changes have been taken place in China.
Great changes have taken place in China.
6.中文：戰爭於一九三七年爆發。
The war was broken out in 1937.
The war broke out in 1937.(take place，break out，happen，belong to等不及物動詞或短語動詞沒有被動語態形式。)
7.中文：我看不清黑板。也許你需要檢查你的眼睛。
