问题描述：
I heard Shanghai is beautiful.还是i heard Shanghai was beautiful
问题解答：
回答i heard Shanghai was beautiful比较保险吧
第一个老师可能说Shanghai is beautiful不是公理（比如地球是圆的）~
答题么~保险重要~
如果你想表达的是：你听说上海曾经很漂亮 就用后者
如果想说：听说上海很漂亮，过去到现在一直很漂亮，就用前者
I were told Shanghai was beautiful. 这句更好。
上海旅游网