—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
答案B.
上句可以简写成As I know, at least, he spends as much time playing as he does writing.
问题是：he spends as much time playing as he does writing. 这句结构不可以理解。
1)比较级是as...as, 这里怎么样理解as...as比较级的结构呢？ 以前容易见到的as...as可以理解，比如He rans as fast as Mike. 但这儿的复杂的as...as...非常难理解，
比如为何是as much time playing as这种不一般的结构呢？和简单的as fast as 不同呀？！
2)does替代spends还是spends time? 怎么样理解，与为何？ 若是替代spends, 那样后面省略了什么？若是替代spends time, 为何不是spends much time 呢？
麻烦老师解析！ 谢谢！
类似的例子：
The boy spent as much time watching TV as he studying.
A.did
B.was
C.does
D.had
答案是A.
我不懂，找不到spend的结构，不可以理解as much time watching as he did studying到底是什么结构？
由于它不符合spend+时间+doing sth这一结构呀？
老师能详细剖析吗？ 谢谢！
句子简化为：
He spends as much time playing as he does writing.
He spends as much time playing as he spends writing.
主句中的比较短语为as much time, 其对应成分需要在从句中省略（或理解为as引导比较分句时要替代比较对应项）。does替代spends, 其宾语需要省略（或理解由as充当了），writing为目前分词作状语。
