Nowadays nearly everyone, male
or female, has more opportunities
to go to college than people ______
thirty years ago.
请问为什么是填did而不能填had呢？
前面不是has吗？
His instructor did not approve of
_______ his fellow students during
the examination.
答案是his helping
可是这样整句读起来好怪哦！
这到底是考什么的文法阿？

1. 仔细看最后面的时态是30年前 当然是过去式阿

had不是过去式吗？

did代替had opportunities to go to college

2) 介系词of后接名词，所以动词需变成动名词形式helping既然已成名词，前方想表示是"谁的"动作就用所有格his囉~

注意 fellow (同侪)，这个He的人与他所要帮助的对象是同侪，因此我想这个"他"也是一位学生。