一、定语从句的种类
根据定语从句与先行词之间关系的紧密程度，我们将定语从句分为限制性定语从句和非限制性定语从句两种。
[观察例句]
This is the computer (that/which)he bought for his son yesterday.
这是他昨天为儿子买的电脑。
I will show you to the supermarket where you can find everything you want.
我会带你去一家超市，在那里你能找到你想要的一切东西。
He is English, which I know from his accent.
他是英国人，那是我通过他的口音知道的。
This is our headmaster, who I think has something important to tell you.
这是我们的校长，我认为他有一些重要的事情要告诉你。
