1.定语从句的两种结构：
A.主句（先行词）+引导词+从句
①This is the pen that I bought yesterday.
这是我昨天买的那只钢笔。
以上划直线部分为主句，其中pen为先行词，that为引导词，引导的斜体字部分为定
语从句，整个定语从句修饰先行词pen。
B.主句部分（先行词）+引导词+从句+主句部分
②The pen that I bought yesterday is made in Japan.
我昨天买的那只钢笔是日本产的。
A句型的特点是主句和从句前后两部分，而B句型的特点是主句被从句隔开。
2.关系代词that，which，who引导的定语从句
见课本P90-P91
练习：
Now add an attributive clause to complete each sentence using that, which, who,
or whose.
①The terrible shaking of the building woke up all the people who were asleep.
②The next day people put up shelters in the open air with all kinds of things
that/which they could find.
③Several days later most of the buildings that/which had been damaged were
repaired
④We went to see our teacher whose husband was killed in the earthquake.
⑤A number of children whose parents had died in the quake were sent to live
with families in other cities.