八年级上 unit 3 知识点总结Word文档下载推荐.docx

1、Bring out the best/worst in sb 二、 同义短语转换以及细节语法 1） Both用法： 单词含义反义词用法Both两者都NeitherBoth复数名词Both of 复数名词Both A and B“A和B都”either两者中任何一个/Either 单数名词Either of 复数名词Eitheror“或者或者”all三者（三者以上）都 noneAll复数名词/不可数名词All限定词可数/不可数名词“全部的，整个”2） 反意疑问句的用法：八字方针：时态：3）Hard-workingAdj “工作努力的，辛勤的”Eg: He is a hard-working bo

2、y.Hard workN 短语 “辛苦的工作”What hard work it is!Work hard短语动词，“努力工作”He always works hard.4） asas 与soas5） Winbeat 6） though “不过，可是，然而”用于句末，前面用逗号隔开 “虽然，尽管”引导让步状语， although（一般放句首） 7）Be likeLook likeFeel like8） The otherThe othersotherothersanother三、 单元大语法：形容词、副词的比较级1）规则变化1.一般在词尾直接加er或est，例如，tall-taller-tal

3、lest，long-longer-longest2.以不发音的字母e结尾的单词在词尾直接加r或st，例如，nice-nicer-nicest3.以辅音字母+y结尾的词，把y变为i，再加er或est，例如，heavy-heavier-heaviest4.重读闭音节，末尾只有一个辅音字母，双写这个辅音字母，再加er或est，例如，big-bigger-biggest5.部分双音节词和多音节词分别在原级前加more构成比较级和most构成最高级，例如，slowly-more slowly-most slowly；beautiful-more beautiful-most beautiful2）不规则

4、变化下列单、双音节词只能加more和most.3）形容词，副词的等级的用法一、原级的用法1.只能修饰原级的词，very，quite，so，too例如，He is too tired to walk on. My brother runs so fast that I cant follow him. 2.原级常用的句型结构（1）“甲+be+（倍数）+as+形容词原级+as+乙”表示“甲和乙程度相同”或“甲是乙的几倍”Tom is as old as Kate.汤姆和凯特年龄一样大。Tom is twice as old as Kate.汤姆的年龄是凯特的二倍。“甲+实意动词+（倍数）+as+副

5、词原级+as+乙”表示“甲和乙程度相同”或“甲是乙的几倍”Tom runs as fast as Mike.汤姆和迈克跑得一样快。Tom runs twice as fast as Mike.汤姆跑得速度是迈克的二倍（2）“甲+be+not+as/so+形容词原级+as+乙”甲不如乙Eg：This room is not as/so big as that one.这个房间不如那个大“甲+助动词+not+动词原形+as/so+副词原级+as+乙”甲不如乙He doesnt walk as slowly as you.他走路不像你那样慢。二、比较级的用法1.可以修饰比较级的词，much，a lo

6、t，far，的多a little，a bit，一点儿,even甚至，still仍然 Lesson One is much easier than Lesson Two.第一课比第二课容易得多。Tom looks even younger than before.汤姆甚至比以前更年轻。This train runs much faster than that one.这辆火车比那辆跑地快。She drives still more carefully than her husband.她开车仍然比她丈夫还认真。2.比较级常用的句型结构（1）“甲+be+（倍数）+形容词比较级+than+乙”表示“

7、甲比乙”或“甲比乙几倍” Tom is taller than Kate.汤姆比凯特高。This room is three times bigger than that one.这个房间比那个大三倍。“甲+实意动词+（倍数）+副词比较级+than+乙”表示“甲比乙”或“甲比乙几倍”I got up earlier than my mother this morning.我今天早晨起床比我妈妈还早。He runs three times faster than his brother.他跑的速度比他弟弟快三倍。（2）“甲+be+形容词比较级+than+any other+单数名词（+介词短语）

8、”表示“甲比同一范围的任何一个人/物都”，含义是“甲最”。 The Yangtze River is longer than any other river in China.=The Yangtze River is longer than any of the other rivers in China.长江比中国的任何一条其他的河都长。=The Yangtze River is longer than the other rivers in China.长江比中国的其他所有的河都长。=The Yangtze River is the longest river in China.长江是中

9、国最长的河流。注意：The Yangtze River is longer than any river in Japan.长江比日本的任何一条河都长。“甲+实意动词+副词比较级+than+anyother+单数名词（+介词短语）”表示“甲比同一范围的任何一个人/物都”，含义是“甲最”。例如，Mike gets to school earlier than any other student in his class.= Mike gets to school earlier than any of the other students in his class.迈克比他们班上任何一个其他的同

10、学到校都早。= Mike gets to school earlier than the other students in his class.迈克比他们班上其他的同学到校都早。= Mike gets to school earliest in his class.迈克在他们班到校最早。Mike gets to school earlier than any student in Toms class.迈克比汤姆班上任何一个学生到校都早。（迈克和汤姆不是同一个班）（3）“甲+be+the+形容词比较级+ofthetwo+”表示“甲是两者中较的”。Eg: Look at the two boy

11、s.My brother is the taller of the two.看那两个男孩，我弟弟是两个当中较高的那个。（4）“比较级+and+比较级”表示“越来越”。例如，He is getting taller and taller.他变得越来越高了。The flowers are more and more beautiful.花儿越来越漂亮。He does his homework more and more carefully.他做作业越来越认真了。（5）“the+比较级，the+比较级”表示“越，越”。例如，The more careful you are，the fewer mis

12、takes youll make.你越认真，犯的错误越少。（6）“特殊疑问词+be+形容词比较级，甲or乙？” Which is bigger，the earth or the moon？哪一个大，地球还是月球？“特殊疑问词+实意动词+副词比较级，甲or乙？ Who draws better，Jenny or Danny？谁画得比较好，詹妮还是丹尼？3.最高级常用句型结构（1）“主语+be+the+形容词最高级+单数名词+in/of短语”表示“是中最的”。 Tom is the tallest in his class./of all the students.汤姆是他们班上/所有学生当中最高

13、的。This apple is the biggest of the five.这个苹果是五个当中最大的。“主语+实意动词+（the）+副词最高级+单数名词+in/of短语”表示“是中最的”。 I jump （the） farthest in my class.我是我们班跳得最远的。（2）“主语+ be + one of the+形容词最高级+复数名词+in/of短语”表示“是中最之一”。 Beijing is one of the largest cities in China.北京是中国最大城市之一。（3）“特殊疑问词 + be + the + 最高级+甲，乙，or丙？”用于三者以上的比较。 Which country is the largest，China，Brazil or Canada？哪一个国家最大，中国，巴西还是加拿大？“特殊疑问词+be+the+副词最高级+甲，乙，or丙？”用于三者以上的比较 Which season do you like （the） best，spring，summer or autumn？你最喜欢哪一个季节，春天，夏天还是秋天？