—Do you have any idea what Paul does all day?
—As I know, he spends at least as much time playing as he _______.
A. writes?? B. does writing???? C. is writing????? D. does write
這是2007年的重慶高考題，正確答案是B，但我不知道為什么A不可以，B答案 does writing 是什么意思？

—Do you haveany idea what Paul does all day?

—As I know, hespends at least as much time playing as he _______.

A. writes??B. does writing? ???C. iswriting? ?? ?D. does write

這是省略，補(bǔ)全句子您可能就明白了：

As I know, he spends at least as much timewatching TV as?he spends time writing.?據(jù)我所知，他花在看電視的時(shí)間至少和花在寫作的時(shí)間一樣多。

這里為避免重復(fù)，用does代替spends, writing與上文的playing相對(duì)。

我們還可這樣改寫句子：

As I know, he spends at least as much timewatching TV as he spends time writing.

= As I know,?the time he spends playing is atleast as much as that he spends writing.

這就更容易看出上下文邏輯關(guān)系了。