Unit 3 Animals Are Our Friends
单元语法聚焦三
[名词所有格& when引导的时间状语从句]
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教材典句
1．They write Li Ming's address on the box and close it with tape.他们在盒子上写上李明的地址并且用胶带把它封上。
2．…Jenny went to her grandparents' house…
……珍妮去了她的祖父母家……
3．Jenny's family gathers at Grandma and Grandpa's house on Thanksgiving Day.
在感恩节那天，珍妮的一家在奶奶和爷爷的家里聚会。
4．When I first came here, everything was different.
当我第一次来这里时，一切都是不一样的。
5．When they arrived, her grandfather opened the door.
当他们到的时候，她爷爷打开了门。
6．I laughed and laughed when I saw it.
当我看到它时，我笑个不停。
语法探究
一、名词所有格
1．构成
(1)一般在名词词尾加“'s”。
She is Tom's new friend.
她是汤姆的新朋友。
Lin Mei is worried about her mother's health.
林梅为她妈妈的健康担忧。
(2)以“s”结尾的________名词，只需在词尾加“'”。
The twins' room is very big.
这对双胞胎的房间很大。
(3)不以“s”结尾的复数名词，仍需要在词尾加“________”。
June 1 is Children's Day. 6月1日是儿童节。
(4)用and连接的并列名词的所有格分两种情况：表示________的所有关系时，要分别在并列名词后加“'s”；表示________时，在最后一个名词后加“'s”。
This is Danny and Tom's desk.
这是丹尼和汤姆的桌子。
Lucy's and Jenny's mothers are in America.
露西的妈妈和珍妮的妈妈在美国。
2．用法
(1)名词所有格主要用于表示有生命的物体(特别是人或高级动物)的所属关系。
(2)无生命的名词所有格一般由
“________＋名词”构成。如：
a picture of our classroom我们教室的一张照片
(3)表示店铺、教堂或某人的家时，名词所有格后面常常省略它所修饰的名词。
He wants to go to the barber's.
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他想去理发店。
(4)表示时间、距离、集体、国家、团体等无生命的名词也可用“'s”构成所有格。
today's newspaper今天的报纸
(5)双重所有格表示整体中的一部分，结构为“of＋________”或“of＋名词性物主代词”。
a book of my father's我父亲的一本书
a friend of mine我的一个朋友
二、when 引导的时间状语从句
1．用法
when 意为“当……的时候”，引导时间状语从句时，可以指时间点，也可以指时间段； 从句可以位于主句________，也可以位于主句________。当从句在前时，主从句之间多用________隔开。
Someone knocked at the door when I was sleeping.
当我正在睡觉时，有人敲门。
When he comes back, please tell me.
当他回来时，请告诉我。
2．时态
一般来讲，when 引导的时间状语从句要遵循主、从句时态相呼应的规律： 即主句是一般现在时(包括祈使句和含有情态动词can, may, must等)，从句也用________；主句是________时，从句也要用过去的时态； 主句是一般将来时，从句要用________表示将来。
I will be a teacher when I grow up.
当我长大了， 我要做一名老师。
实战演练
单项选择
( )1.________ room is big and nice.
A. Kate's and Jane's
B. Kate's and Jane
C. Kate and Jane's
D．Kate and Jane
( )2. 2017·凉山—How far is your home from the train station?
—It's about 20________ walk.
A. minute B. minutes
C. minute's D. minutes'
( )3.________ mothers can't go to the parents' meeting because they are too busy.
A. Jack's and Paul
B. Jack's and Paul's
C. Jack and Paul's
D. Jack and Paul
( )4.—________ is coming. What can I get for my mother?
—What about a scarf?
A. Women's Day B. Woman's Day
C. Womens' Day D．Womans' Day
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( )5.The online shop sells________ clothing at very good prices.
A. child and man's
B. children and men's
C. children's and men
D. children's and men's
( )6.Mr. Wang is an old friend ________ mine.
A．with B．of
C．to D．at
( )7.Steve________ TV in the living room when his mother came in.
A. was watching B. watches
C .is watching D．watched
( )8.2016·重庆 Don't worry. Bill will help you look after your dog when you ________away on business.
A．are B．were
C．will be D．have been
( )9.2016·济南 Sun Hai________ his mother make dinner when his father got home from work.
A. was helping B. helps
C. helped D. is helping
( )10.My mother________ dinner when I got home yesterday.
A. has cooked B. was cooking
C. will cook D. cooks
( )11.Birds ________ back to the north when it becomes warm.
A．goes B．went
C．has gone D．will go
( )12.The teacher is already standing here.Do you know when she ________？
A．comes B．came
C．is coming D．was coming
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教师详解详析
【语法探究】
一、1.(2)复数 (3)'s (4)各自； 共有
2．(2)of (5)名词所有格
二、1.之前； 之后； 逗号
2. 一般现在时；一般过去时；一般现在时
【实战演练】
1—5 CDBAD 6—10 BAAAB
11－12 DB
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