相当于the place that，因此what不能改为that，也不能改为where，因为where 只能作状语。

used to do过去常常（做）......；曾经......

易混短语辨析：

used to do/be used to do/be used to doing

used to do sth. (would do) 过去经常做某事

be used to do 被用来做......(被动语态)

be/get/become used to sth./doing

=be/get/become accustomed to sth./doing 习惯于

My father used to smoke a lot.

我父亲过去烟抽得很厉害。（暗含"现在不抽了或抽得少了"的意思）

I used to live in the countryside with my grandmother.

我曾经和祖母在农村生活过。

Wood can be used to make paper.

木头可以用来造纸。

I'm still not used to getting up early.

我仍然不习惯早起。

2. No other countries could join in, nor could slaves or women!

其他国家都不能参加，奴隶和妇女也不能参加!

句子结构为：nor/neither+系动词/助动词/情态动词+主语。此句型是一个倒装句，意为"......也不"，用于否定陈述句之后，说明后者的情况与前者相同。

联想拓展

用"so+助动词+主语"结构，表示肯定陈述句之后说明后者情况与前者相同，so it is with sb./It is the same with sb. 某人也是这样。so it is with sb./It is the same with sb.结构陈述两种或两种以上的情况，既可用于肯定，也可用于否定。

"否定词+助动词+主语"是常用的倒装句式，常用词：not, never, no, nowhere, neither, nor, hardly, seldom, little, rarely。

If you won't go, neither/nor will I.

如果你不去，我也不去。

He don't know about it. Nor do I.