5 since when的定语从句和倍数+what的名词性从句求解惑

1. The town was rebuilt in 1990, since when its tourism industry has enjoyed rapid development.

我知道该句是由The town was rebuilt in 1990, and since then...then转化为when得来的,但thenwhen指代的是什么呢,是in 1990吗?

2. The output this year is five times what it was ten years ago. 此处what引导的是什么类型的名词性从句?我有两个想法:

此处相当于A is five times B,但“A+be+倍数+B”是否是一个固定结构?如果该结构存在,what引导的是什么从句,是表语从句吗?

此处可以写成The output this year is five times (more than) what it was ten years ago.然后将括号内容删除了,那此时what就是than后面的宾语从句。这二者中是否有正确思路?

求解惑,谢谢!

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1 个回答

Solomon  

倍数表示法的理解困惑 - 柯帕斯英语网 看第三句话和你的一样

then=at the time mentioned=1990这个时间点,然后since+时间点,就变成了and since then--since when。你可以看帖子,我觉得逻辑转换灵活点,不是非要变成in 1990

定语从句since when - 柯帕斯英语网

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  • 提出于 2026-08-16 16:49