請分析這一道英文習題

Question

He is having trouble ________ the lost key.

(A) finding

(B) to find

(C) found

(D) find

此題答案是(A)

為何是A?為什麼不是B?又having 在此題中又代表何意?

Update:

請問QQ：

因為having是Ving所以這裡只能放現在分詞

這意思我不太懂？

Answer 1

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He is having trouble finding the lost key.

這是現在分詞用法, 非常普遍, 例如:

It is no use crying over the spilt milk.

He had a hard time persuading his father.

如果原句用不定詞: He is having trouble to find the lost key. (X)

意思變成: 他有了麻煩用來尋找遺失的鑰匙. ← 語意就完全走樣不知所云了.

Source(s): 自己的翻譯經驗; 英文文法

Answer 2

因為having是Ving所以這裡只能放現在分詞

have trouble 是只遇到問題

在這當無法

He is having trouble finding the lost key.他無法找到失去的關鍵