内容正文:
Unit 3 Same or Different语法专项讲练人教版八年级英语上册
一、语法核心知识点
(一)定义
形容词和副词的比较级用于比较两个人或事物之间性质、特征或动作程度的差异,清晰表达一方在某方面比另一方更具特质或程度更高。
(二)比较级构成规则
1. 规则变化
①一般情况:直接加 -er(例:tall → taller;fast → faster)
②以不发音的 e 结尾:加 -r(例:nice → nicer;late → later)
③以 “辅音字母 + y” 结尾:变 y 为 i 加 -er(例:happy → happier;early → earlier)
④重读闭音节(末尾只有一个辅音字母):双写辅音字母加 -er(例:big → bigger;hot → hotter;thin → thinner;fat → fatter)
⑤部分双音节和多音节词:加 more(例:outgoing → more outgoing;beautiful → more beautiful;seriously → more seriously)
2. 不规则变化(需特殊记忆)
good /well → better(更好的 / 好地)
bad /badly/ill → worse(更坏的 / 坏地)
many /much → more(更多的)
little → less(更少的)
far → farther(更远的,侧重距离)/further(更远的,侧重程度)
old → older(更年长的)/elder(更年长的,侧重辈分)
(三)核心用法
1. 两者之间比较
基本结构:A + be 动词 / 实义动词 + 比较级 + than + B
例:Tom is taller than his brother.(汤姆比他弟弟高。);
She sings better than me.(她唱歌比我好。)
2. 两者之间选择
结构:Which/Who is + 比较级,A or B?
例:Who runs faster, Lucy or Lily?(露西和莉莉谁跑得更快?)
3. 两者之间较…… 之一
结构:the + 比较级(of the two)
例:He is the smarter of the two boys.(他是两个男孩中较聪明的那个。)
4. 越来越……
单音节 / 部分双音节词:比较级 + and + 比较级
例:The water is getting warmer and warmer.(水变得越来越暖和。)
多音节 / 部分双音节词:more and more + 原级
例:She is becoming more and more confident.(她变得越来越自信。)
5. 越…… 越……
结构:the + 比较级,the + 比较级
例:The harder you study, the better grades you will get.(你学习越努力,成绩就会越好。)
6. 修饰比较级
常用修饰词:much(…… 得多)、a little(一点儿)、even(甚至)、far(…… 得多)
例:This book is much more interesting than that one.(这本书比那本有趣得多。);
He is a little taller than me.(他比我高一点儿。)
7. 同级比较
表示 “和…… 一样”:as + 原级 + as
例:She is as careful as her sister.(她和她姐姐一样细心。)
表示 “不如……”:not as/so + 原级 + as
例:This pen is not as good as that one.(这支笔不如那支好。)
二、巩固练习
练习一:单项选择
1.Peter is ______ than his classmate. He always shares his things with others.
A. generous B. more generous C. the most generous
2.— Is this movie ______ than the one we watched last week?
— Yes, it’s much more exciting.
A. interesting B. more interesting C. the most interesting
3.My mother cooks ______ than my father. Everyone likes her food.
A. well B. better C. best
4.— Who walks ______, Tom or Jerry?
— Tom. He is slower than Jerry.
A. more slowly B. slowly C. slowlier
5.The air in the countryside is ______ than that in the city.
A. fresh B. fresher C. the freshest
6.Lily studies ______ than before, so her grades have improved a lot.
A. hard B. harder C. hardest
7.This skirt is ______ than the red one. I want to buy the cheaper one.
A. cheap B. cheaper C. cheapest
8.— Is your brother ______ than you?
— No, he is as tall as me.
A. taller B. tall C. the tallest
9.She sings ______ than any other student in her class. She is the best singer.
A. more beautifully B. beautifully C. most beautifully
10.The weather is getting ______ as winter comes.
A. cold and cold B. colder and colder C. more and more cold
练习二:用所给单词的适当形式填空
1.This storybook is ______ (interesting) than the science book.
2.My sister runs ______ (fast) than me because she practices every day.
3.He is ______ (happy) today than yesterday because he got a good grade.
4.The math problem is ______ (difficult) than the English one.
5.She speaks English ______ (fluent) than her brother.
6.This park is ______ (clean) than the one near my home.
7.My father is ______ (busy) than my mother these days.
8.The little girl is ______ (quiet) than her brother.
9.He drives ______ (carefully) than his friend.
10.This apple is ______ (good) than that one. It’s sweeter.
练习三:根据汉语提示完成句子
1.我的朋友比我更外向。My friend is ______ ______ than me.
2.这个书包比那个更重。This schoolbag is ______ than that one.
3.她跳舞比她妹妹更好。She dances ______ than her sister.
4.北京的夏天比昆明更热。Summer in Beijing is ______ than that in Kunming.
5.他写作业比我更认真。He does his homework ______ ______ than me.
6.这本书不如那本书有用。This book is not ______ ______ ______ that one.
7.越锻炼,你就越健康。______ ______ you exercise, ______ ______ you will be.
8.这个城市变得越来越美丽了。This city is becoming ______ ______ ______ beautiful.
9.她是两个女孩中较高的那个。She is ______ ______ of the two girls.
10.他比我大两岁。He is two years ______ than me.
练习四:句型转换
1.Tom is tall. Jim is taller.(合并为一句)
Jim is ______ ______ Tom.
2.She runs fast. Her sister runs faster.(合并为一句)
Her sister runs ______ ______ her.
3.This shirt is cheap. That shirt is cheaper.(合并为一句)
That shirt is ______ ______ this one.
4.He is as old as his cousin.(改为否定句)
He is not ______ ______ ______ his cousin.
5.She sings beautifully. He sings more beautifully.(合并为一句)
He sings ______ ______ ______ her.
6.My mother is busy. My father is busier.(合并为一句)
My father is ______ ______ my mother.
7.This movie is interesting. That movie is more interesting.(合并为选择疑问句)
Which movie is ______, this one ______ that one?
8.He studies hard. She studies harder.(合并为一句)
She studies ______ ______ him.
9.The river is long. The lake is longer.(合并为一句)
The lake is ______ ______ the river.
10.Lucy is careful. Lily is more careful.(合并为一句)
Lily is ______ ______ ______ Lucy.
练习五:补全对话
A: Hi, Mary! I haven’t seen you for a long time. You look different now.
B: Hi, Tom! Yes, I’ve changed a lot.
A: You are ______ (thin) than before. Did you lose weight?
B: Yes. I exercise every day. I think exercising is ______ (good) than staying at home.
A: You’re right. Do you exercise more ______ (often) than before?
B: Yes. I go running every morning. It’s ______ (easy) than I thought.
A: How about your study? Did you get ______ (good) grades than last term?
B: Yes. I study ______ (hard) than before. My math is ______ (good) now. What about you?
A: I’m not as ______ (good) at math as you. I need to study ______ (carefully) than before.
B: Don’t worry. If you study ______ (hard), you will get better grades.
A: Thank you. I will try my best.
三、参考答案
练习一:单项选择
1.B 2.B 3.B 4.A 5.B
6.B 7.B 8.A 9.A 10.B
练习二:用所给单词的适当形式填空
1.more interesting 2. faster 3. happier 4. more difficult 5. more fluently
6.cleaner 7. busier 8. quieter 9. more carefully 10. better
练习三:根据汉语提示完成句子
1.more outgoing 2. heavier 3. better 4. hotter 5. more carefully
6.as/so useful as 7. The more; the healthier 8. more and more 9. the taller 10. older
练习四:句型转换
1.taller than 2. faster than 3. cheaper than 4. as/so old as 5. more beautifully than
6.busier than 7. more interesting; or 8. harder than 9. longer than 10. more careful than
练习五:补全对话
1.thinner 2. better 3. often 4. easier 5. better
6.harder 7. better 8. good 9. more carefully 10. harder
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