I saw the cat runing yesterday 这个yesterday是修饰整个句子吗
对。
the surroding we saw was so beautiful. 这句话对吗
不对的，个别单词还有拼写错误。
The surroundings we saw were so beautiful.surroundings 【（周围的）环境[事物]；环境】用复数
I saw the dog yesterday.句子中的saw可替换的单词有哪些
I met the dog yesterday. The wind blew away my bandelet.She seat in her room.如果可以是不同的意思，就有很多了。
I saw the accident while waited for the bus.这句话哪错了
waited 不对 应该是主动语态 改为waiting
