12.某些数字的读法与写法, 如: $10.20读作ten dollars and twenty cents; 35Ｏ 读作thirty-five degree; -20Ｏ 读作twenty degree below zero或minus twenty degree; Napoleon III读作Napoleon the third; World War II读作World War two或the second world war.

13.年龄的表示方法:
a. The boy is ten years old.
b. The boy is at the age of ten.
c. He is a ten-year-old boy.
d. The boy is of ten years.

14. in one’s + 整十数的复数形式, 表示在某人几十多岁的时候, 如:
a. He became famous in his thirties.
15. in the 1930s / 1930’s表示在二十世纪三十年代
16. 序数词前一般要用the, 但表示又一,再一的概念时, 序数词前也可以用a / an
a. They plan to buy a second house. 他们计划再买第二房子

高考英语语法：定语从句
关系代词引导的定语从句
一.关系代词的用法: 关系代词指代先行词
在定语从句中作主语
在定语从句中作动词的宾语或者介词的宾语, 介词在后

指人
that / who
that / who / whom
指物
that / which
that / which

上表中黑框内的关系代词可以省略; 在口语及非正式文体中whom常被who所替代; 另外, 关系代词whose表示 (先行词)的

二.示例:
1.关系代词在定语从句中作主语
a. Do you know the man that / who came to see Xiao Yang this morning ?
b. This is a book that / which tells about space rocket.

2.关系代词在定语从句中作动词的宾语
a. The comrade ( that / who / whom ) they came to visit is a scientist.
b. I will never forget the day ( that / which ) we spent in the countryside.

3.关系代词在定语从句中作介词的宾语, 介词在后
a. This is the house ( that / which ) he was born in.
b. The person ( that / who / whom ) you should write to is Mr Ball.
c. The man ( that / who / whom ) you talked with is our English teacher.

4.whose引导的定语从句
a. I know a lady whose husband is a Nobel Prize winner.
b. The child whose mother died in the fire is now an engineer in our company.
c. He is living in a house whose windows are painted white.

三.应注意的问题:
1.指物时, 关系代词只用that而不用which的情况:
①.先行词被最高级或the only, the very, the same等修饰时
a. This is the best play that was written by Jack.
b. He is the only person that I can trust.

②.先行词被序数词或the last等词修饰时
a. This is the first car that arrived this morning.
③.先行词为all, everything, nothing, something, anything等不定代词时或被不定代词all, any, no等修饰时
a. All the people that come from the country work much harder.
b. This is all that I can tell you.

④.人+动物或事物共同作为先行词时
a. My father and Mr Brown talked of things and persons that they remembered for about an hour.
⑤.句中又有which作为疑问词出现时
a. Which is the train that goes to Beijing ?

2.关系代词who, which, that在定语从句中作主语时, 要注意定语从句中的主谓一致问题. 因为who / that / which指代先行词, 所以定语从句的谓语与先行词保持一致即可
a. I came to get the book that was left in the classroom.
b. I came to get the books that were left in the classroom.

关系副词引导的定语从句
一.关系副词的用法: when在定语从句中作地点状语; where在定语从句中作地点状语; why在定语从句中作原因状语