【问】 To spend so much money on something he didn't even need!

A. He has money to spend on several important things.

B. He spent money unwisely.

C. He didn't want to spend money on anything.

D. He didn't need much money(TOEFL，87. 10)

原试题似乎并不是一个完整的句子。我从没有见过这种句型，请分析其特点。

【答】 这种句子被划为不规则的句子(irregular sentences)。其结构特点是：只有带to的动词不定式，没有主语。但是，从上下文或语境可以看出其隐含的主语。其语义特点是：表示惊讶，有时含有不赞同或不满或遗憾的情绪。

1. To think that he should be so mean! (CGEL)

真没想到他竟然这么卑鄙! (隐含的主语是I)

2. You fool，to forget your wedding anniversary!

1213 today1

你这个傻瓜，竟然忘记了你的结婚纪念日! (隐含的主语是You)

3. That brother of yours，to be so uncouth!

你的那位兄弟，竟然那么粗鲁!

我想你看了上面的例句，便会很快地知道上道题的答案是B。(参见to think that)