内容正文:
Unit1 Asia
Period 4 Grammar I
【学习目标】:1. 了解“it”的含义
2. 学习“it”的人称代词用法
3. 了解并学习分数的表达
【重点】:掌握it作人称代词时的用法
【难点】:学生能正确使用“it”
【课前预习】
翻译词组
1. 据说 _________
2. 那块地的四分之三 __________________________________________________________
3. 非常值得参观 _____________________________________________________________
4. 一座有17个桥洞的桥 _______________________________________________________
5. 早晨早些的时候 _______________ ______ __
6. 离开北京去上海 ____________________________________________________________
7. 感到有一点冷 ________________ ______ __
8. 占据(时间,地方) ____________________ ______ __
9.叫某人做某事 ____________
10. 和我想象的一样严重______________ ______ ________
【精讲展示】
1. Uses of it
A我们常用it作人称代词,代替人、事、物等。
●it 用来指代动物或者无生命的事物。(如果动物是宠物,也可用she或he代替)
Eg. This is my pet dog. I like it/ him / her very much.
●it 用来指代不清楚性别的婴儿。
Eg. My mother will have a second baby. I guess it is a boy.
●it用来指代不明身份的人
Eg. There is a knock on the door. Go and see who it is.
●it用来指代前面提到过的人、事、物.
Eg. Many people have been to Shanghai. It is a modern city.
2. The lake is very big- it takes up three quarters of the area.
①take up占据(空间), 占用(时间)
Eg. I' m sorry that I have taken up your valuable time. 对不起我占用了你的宝贵时间。
②分数的表达:分子用基数词,分母用序数词,分子超过一,分母加s。
三分之一one/ a third
九分之一one/ a ninth五分之二 two fifths
二十分之七seven twentieths
四分之三three quarters
分数结构作主语,由of后的名词决定谓语动词的单复数。
Eg. About two thirds of the students are going to attend the meeting.
Three fifths of the time has run out.
★分数、百分数 some、half、most、all、the rest与of连用时,由of后的名词决定谓语动词单复数
【课后巩固】
I.基础达标(50分)
一.词汇(20分)
A.根据中文和首字母填空。(10分)
1. Three (四分之一) of the students choose to play basketball in the test.
2. —Did you ever work with (两者之一) of them?
—No. I even didn't know them.
3. The Turpan Basin in Xinjiang is the world's low