英语the surface of the water looks much like it did before the disaster!解释为什么用did?

英语the surface of the water looks much like it did before the disaster!解释为什么用did?
英语the surface of the water looks much like it did before the disaster!解释为什么用did?

英语the surface of the water looks much like it did before the disaster!解释为什么用did?
虽然一定是有上下文有语境,但是本句算是意思很明了的了：
水面看起来与灾难前几乎一样
这里did是在比较句型中一个经典的省略用法,除去省略后的原句应该变成：
The surface of the water looks much like what it looked like before the disaster!
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水面 看起来非常像 它在灾难前看起来的那样
从中文的直译可以看出语意复沓严重,因而一般就把what 和like省掉了,然后用did直接代替了looked这个谓语
有的时候,甚至连谓语都省了,试试看你能不能够省略改写下面这句：
His song doesn't feel as much like a story as what my song feels like.
His song doesn't feel as much like a story as my song (does).does可要可不要

楼下解释很清楚啊，我那个是误人子弟咯~

这个池塘的水面看起来非常像以前的灾难。因为是 before 所以用did，过去式。

水的表层看起来跟它在发生大灾难之前很像
the surface of the water looks much like it did before the disaster！
it did 相当于是 it looked
主要是说现在的the surface of the water跟大灾难之前的the surface of the water看起来很像
那么...

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水的表层看起来跟它在发生大灾难之前很像
the surface of the water looks much like it did before the disaster！
it did 相当于是 it looked
主要是说现在的the surface of the water跟大灾难之前的the surface of the water看起来很像
那么过去的水表面是 it 指代了the surface of the water ，
本来是the surface of the water looked
变成it looked
而前面是look，后面也是同样的动词look,这时候可以直接用助动词来代替，就像it代替了the surface of the water 那样
所以it　looked 就变成it did 了
I ride much farther than I did yesterday.
前后都想表达ride这一动词，后面可以用助动词来代替~~

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it代指的是the surface，did替代的是look，before the disater 显然是表示过去的时间状语，所以用过去时！

did 代指 looked like。水面看起来与灾难前几乎一样