语法图解
探究发现
①This gift was the Amber Room, which was given this name because several tons of amber were used to make it.
②The amber which was selected had a beautiful yellowbrown colour like honey.
③However, the next King of Prussia, Frederick William Ⅰ，to whom the amber room belonged, decided not to keep it.
④Later, Catherine Ⅱ had the Amber Room moved to a palace outside St Petersburg where she spent her summers.
⑤This was a time when the two countries were at war.
⑥There is no doubt that the boxes were then put on a train for Königsberg, which was at that time a German city on the Baltic Sea.
[我的发现]
(1)例句①中含which引导的非限制性定语从句；例句②中含which引导的限制性定语从句；在形式上非限制性定语从句与限制性定语从句的区别在于：关系词前是否有逗号。
(2)以上例句中含非限制性定语从句的有①③⑥；含限制性定语从句的有②④⑤。
