The students under the tree are chatting under the tree 划线提问
问题描述：
The students under the tree are chatting under the tree 划线提问
原句 The students under the tree are chatting 是under the tree划线提问
答
Which students are chatting?under the tree 是修饰主语the students 的,所以问的是哪些学生在聊天,如果句子是the students are chatting under the tree,就可以用where来提问了