1、that作指示代词：That is my book.那是我的书。 2、that作指示形容词：We havent found any solution to deal with that problem yet.我们仍未找到解决问题的办法。 3、that作关系代词引导定语从句：This is the sort of thing that Jeremy loves.这是杰里米喜欢的东西。 4...