一复合不定代词不指明代替任何特定名词或形容词的代词叫不定代词，它们有some, any, much, many 等以及由every-, some-, any-, no-加上-thing, -body, -one构成的复合不定代词。
下面我们主要学习有关复合不定代词的内容。
1、复合不定代词的分类指物：everything, something, anything, nothing指人：everybody, somebody, anybody, nobody everyone, someone, anyone, no one2、复合不定代词的用法1. ◆some-类的复合不定代词一般用于肯定句中。
如：There is somebody at the door.◆any-类的复合不定代词一般用于否定句或疑问句中，表示“某事；某物；某人”；也可用于肯定句或条件从句中，表示“任何东西；任何人”。
如：There isn't anything in the box.Did you see anybody there?If anybody comes here, please ask him to wait.2. 复合不定代词作主语时，谓语动词常用单数形式。
如：Everybody knows he sings well.3. 复合不定代词若有定语(形容词或不定式)修饰时，定语要放在其后。
如：There's nothing new about this.I want something to eat.【运用】单项选择1. —Who taught Zhu Zhiwen to sing?—________! He learned singing by himself.A. EverybodyB. SomebodyC. Nobody2. There is ________ wrong with my back and it hurts seriously.A. anythingB. somethingC. nothing3. I always believe that ________ is difficult if we try our best to do it.A. somethingB. anythingC. everythingD. nothing4. —Would you please tell me ________ in today's newspaper?—Sorry, I haven't read it yet.A.something importantB. important somethingC. anything importantD. important anything5. —Is there ________ in today's newspaper?—Yes. A terrible accident happened in Hubei.A. special somethingB. anything specialC. something special6. When our teacher heard of the news, he was too angry to say ________.A. everythingB. nothingC. somethingD. anything二频度副词频度副词表示事情发生的频率。
常见的频度副词有always, sometimes, hardly ever, usually, often, never等。
◆常见的频度副词的频率大小如图所示：◆频度副词的位置: 频度副词通常放在实义动词之前，系动词、助动词或情态动词之后，但有些频度副词如sometimes，often等位置比较灵活，还可以放在句首或句尾。
如：David usually gets home at about this time.My sister doesn't always read in the library.(注意：always 与not连用，表示部分否定，意为“并非总是”。
若要表示全部否定，应用never。
)My father sometimes / often works at the weekend.Sometimes / Often my father works at the weekend.My father works at the weekend sometimes / often.◆当对频度副词及表示事件发生频率的短语提问时，常用how often，意为“多久一次”。
如：·Bill never goes to the cinema. (对划线部分提问)→How often does Bi ll go to the cinema?·I wash my clothes three times a week. (对划线部分提问)→How often do you wash your clothes?1.The teacher hardly gives us a test._____ _____ ______ the teacher give you a test?2.I never get up before five o’clock?_____ _____ do you get up before five o’clock?3.Li Tao often has rice for lunch._____ _____ Li Tao often _____ for lunch?4.I usually read English in the morning._____ _____ you usually ______ in the morning?5.My mother goes to see my grandparents twice a month._____ _____ _____ your mother _____ to see your grandparents?Ⅱ. 汉译英1. 这个女孩总是非常高兴。
_________________________________________2. 埃里克(Eric)多久打扫一次房间？_________________________________________三形容词、副词的原级和比较级大多数形容词和副词有三个等级：原级、比较级和最高级。
本单元我们主要学习形容词、副词的原级和比较级的构成及其用法。
◆原级形容词、副词的原级即原形。
1. 原级可用于句型“主语+ be / 行为动词+ as + 形容词 / 副词原形+ as +比较对象.”，该句型表示两者在某一方面相同。
当表示一方在某一方面不及另一方时，常用句型“主语+ be + not + as / so + 形容词原形+ as +比较对象.”或“主语+ don't / doesn't / didn't + 行为动词原形+ as / so +副词原形+ as +比较对象.”。
如：This dress is as beautiful as that one.Tom isn't as / so tall as me.2. 原级前可用very，quite，too等副词修饰。
如：I'm very hungry.◆比较级构成一．形容词比较级的变化1. 规则变化（1）在形容词后直接加-er。
如：tall-----taller，short------shorter等。
（2）以不发音的字母e结尾的只需在末尾加-r。
如：nice------nicer，large-------larger等。
（3）以“辅音字母+y”结尾的形容词，要先把y变成i，然后再加-er。
如：heavy------heavier，happy------happier等。
（4）若以重读闭音节结尾且只有一个辅音字母，先双写这个辅音字母，然后再加-er。
如：fat------fatter，hot------hotter等。
（5）多音节和部分双音节的形容词，可不是在末尾变化，而是在前面加more。
如：careful-----more careful，athletic-------more athletic等。
2. 不规则变化good /well------better bad /badly-------worse many /much-------more few /little------less二．形容词比较级的用法在描述单个的某人或某物所具有的特征时，需要用形容词原级形式，当把两者进行比较时，就用比较级，常见的表示这类用法的句型有：1.“A+be+比较级+than+B”表示“A在某方面超过B”。
如：This book is dearer than that one. 这本书比那本书贵2.“Which /Who(se)+be+比较级, A or B?”意思是“A和B，哪个更…….”。
如：Which is bigger, the sun or the earth? 太阳和地球，哪个更大？Whose bag is heavier, yours or mine? 谁的包重些，你的还是我的？3.“A+be+the+比较级+of the two(……)”意思是“A是两者中较…….的一个。
”这时前面一定要加the，表示特指。
如：Lily is the taller of the twins. 莉莉是双胞胎中个子较高的那个。
三．常与比较级连用的词1. 前面可以加上a little，a lot，much，even，still等程度副词作修饰语。
如：She is much more careful than her brother. 她比她哥哥细心多了。
2. 前面还可以加表示数量、倍数的修饰语。
如：My brother is two years older than I. 我哥哥比我大两岁。
This room is twice bigger than that one. 这个房间比那个房间大两倍。
Ⅰ. 单项选择1. Lisa was still very weak (虚弱的) when she left hospital. But after a week's rest, she felt much______ and went back to school.A. goodB. betterC. badD. worse2. Liu Li is ______ than the other students in my class.A. popularB. more popularC. the most popular3. This camera is too expensive. I'd like a ______ one.A. cheapB. cheaperC. cheapestD. more expensive4. Look! This house is as ______ as that one.A. the most beautifulB. more beautifulC. beautiful5. Alex did the project (项目) on community service ______ better than his classmates.A. soB. veryC. tooD. muchⅡ. 写出下列形容词或副词的比较级和最高级。