We visited the park which is very beautiful yesterday 这句话为什么是错的?

问题描述:

We visited the park which is very beautiful yesterday 这句话为什么是错的?

容易有歧义,容易产生我们去了那个昨天很漂亮的公园(今天不漂亮)
应该是Yesterday we visited the park which is very beautiful.