阿摩線上測驗
22 ________ that Grandma was hospitalized, I would have visited her last night with my brothers.
(A) Had I known
(B) I have known
(C) I should know
(D) Were I knowing
答案：登入後查看
統計： A(589), B(121), C(89), D(114), E(0) #3093470
統計： A(589), B(121), C(89), D(114), E(0) #3093470
詳解 (共 9 筆)
萬晉宏
#5948434
省略If並倒裝的用法(與過去事實相反之假設語氣)
原始句為:If I had known that Grandma was hospitalized, I would have visited her last night with my brothers.
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林大目
#7374836
。句子結構是「________ that Grandma was hospitalized, I would have visited her last night with my brothers.」這是一個與過去事實相反的假設語氣（第三類條件句）。在這種句型中，if 子句使用過去完成式（had + 過去分詞），主要子句使用 would have + 過去分詞。選項中只有 (A) Had I known 符合這種結構，它其實是 If I had known 的倒裝形式，省略 if 後將 had 提前。其他選項不合適：(B) I have known 是現在完成式；(C) I should know 是現在式；(D) Were I knowing 是表示現在或未來的假設（且 know 通常不用進行式）。因此正確答案為 (A)。
答案：(A)
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根據句子結構，此為與過去事實相反的假設語氣（第三條件句），if 子句應使用過去完成式，且可省略 if 並將 had 提前形成倒裝。選項 (A)「Had I known」即為「If I had known」之倒裝，符合語法。
| 假設類型 | 原句 if 子句 | 倒裝形式 | 例句 |
|---|---|---|---|
| 與過去事實相反 | If + 主詞 + had + p.p. | Had + 主詞 + p.p. | Had I known, I would have come. |
| 與現在事實相反（be 動詞） | If + 主詞 + were | Were + 主詞 | Were I you, I would say sorry. |
| 與未來事實相反（可能性低） | If + 主詞 + should + V | Should + 主詞 + V | Should it rain, we will cancel. |
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