where在英语中可以引导多种从句，是一个具有多重功能的引导词。它既是高考考查的重点，也是同学们容易混淆的难点。在课本前几个单元中也多次出现where引导的从句，中就出现了where引导的两种从句：
1. Some of the native population moved to the inland, mountainous parts of the islands, to Ireland, Scotland and Wales, where they continued speaking their own languages. （定语从句）
2. It is built where two rivers come together. （地点状语从句）
