5.相互代词

①在句中可作宾语

They help each other and learn from each other.

②加’s后成为所有格,作定语

They asked about one another’s life and work.

4.指示代词

①this和that是近指, that和those 是远指

I don’t want this book. I want that one.

②有时为了避免重复,常用that/ those 来代表前面出现过的名词

At this time of year, the weather here is much colder than that in Nanjing.

③this和that都可代表前面提到过的事情,若出现两个名词,指代前面的用that指代较后面的用this；但若指下文将要叙述事情,则只能用this，不能用that。此外，还可用于代替上文中出现过个单数或不可数名词，且后面带有of短语修饰。

Health is above wealth; this cannot give so much happiness as that.

健康胜于财富;财富不会像健康那样带来那么多幸福(句中this=wealth;that=health)　

They cant afford it.That/this is their problem.

What I want you to remember is this :English is of great use.(此句中this不能用that替换)

The population of Shanghai is larger than that of Suzhou.

④such的用法

such 一般在句中作定语和主语.用作定语时,它所修饰的名词前的不定冠词应放在之后。

Such is my answer.

Such are the results of the exams.

I have never seen such beautiful flowers.

用作定语时,它所修饰的名词前的不定冠词应放在such之后such a good book。

3.反身代词

①用作宾语、表语，或主语、宾语的同位语

He teaches himself Japanese every evening.(宾语)

She is not quite herself today.她今天身体不太舒服。(表语)

I myself can repair the bike.(主语的同位语)

②常用含有反身代词的惯用语归纳

by oneself= alone 独自　　　　　　　　　　　　　 for oneself独立、为自己

be oneself处于正常状态,显得自然　　　　　　　　 enjoy oneself玩得愉快

seat oneself坐下　　　　　　　　　　　　　　　　 dress oneself in 给自己穿

devote oneself to专心于、献身于　　　 　　　　　　help oneself to 自行取用、不用客气

come to oneself苏醒　　　　　　　　　　　　　　 make oneself at home 不要客气

2.物主代词

①形容词性物主代词只能作宾语

We love our motherland.

②名词性物主代词可用作主语,表语和宾语

Your coat is black while mine is red.

1.人称代词

①在句中作主语,用主格，在句中作宾语,则用宾格；

She teaches them physics.

②在句中作表语,常用宾格；

Who is it? It’s me.

但有时要用主格：It was I who told him the whole story.

在强调句型中,强调的是主语,故I用主格。

③两个或两个以上的人称代词并列时,其顺序是：

单数按2,3,1人称排列，复数按1,2,3人称顺序排列。

you, she and I ; we, you and they

例6．已知函数．

(1)求的定义域和值域；(2)讨论单调性．

练习6: 已知函数．

(1)求的定义域和值域；(2)讨论单调性．

课堂小结：___________________________________________________________________

_____________________________________________________________________________________________________________________________________________________________

例5．比较下列各组数的大小：

(1)和 ；　 (2)和；　 (3)和　．　　

练习5．比较下列各组数的大小：

　 (1)和 ；　 (2)和；　 (3)和　．

例4．(1)函数是奇函数,且当时,,则时,__________．

　　 (2)设是上的偶函数,则________________．

练习4．(1)定义在上的函数是奇函数,且当时,,则 时,__________．

(2)已知函数,若为奇函数,则________________．

例3．函数的值域

练习3:求函数的值域．