as和when是否都可以引导时间状语从句?

OG NO1

1.  The Wallerstein study indicates that even after a decade young men and women still experience some of the effects of a divorce occurring when a child.

(A)  occurring when a child

(B)  occurring when children

(C)  that occurred when a child

(D)  that occurred when they were children

(E)  that has occurred as each was a child

... Choice E ...and wrongly replaces when with as....

问题: 在ETS的思路里,是不是时间状语从句都要由when来引导,而as引导的从句只出现在比较里? 我依稀记得日常英语中as应该也可以作为时间状语从句的引导词吧.

原因+同时. 精辟,我懂了,谢谢南瓜JJ!