高中英语：Module5_A_lesson_in_a_lab-grammar教案(外研版必修1).doc

Module5 A Lesson in a Lab-grammar教案
Teaching content and aims:
1. Learn the expressions about the degrees of comparison.
2. Learn some adverbs which can put in front of the comparative expressions of adjectives and adverbs.
3. Write out these sentence patterns.
Teaching Design:
Task: Learn the comparative expressions.
Pre-task Revision
A. Revise what we have learned last lesson.
B. Lead-in
The earth is forty-nine times larger than the moon.=The earth is forty-nine times as large as the moon.
Today, we’ll learn the degrees of comparison.
Cycle-task
Activity 1:Instruction
1． 形容词和副词的比较等级的用法：
1） 原级比较：表示两者程度相同。用句型表示：(倍数+)as+adj./adv.原级+ as …,否定句式：not +(倍数+)as/so+ adj./adv.原级+as…,如:
e.g. Dick is as tall as his brother.
I have never seen a person as/so clever as he is.
2） 比较级：
A.表示A超过B。此时使用句型： A is (倍数+)形容词和副词的比较等级+than+B如：
Our classroon is brighter than yours.
Dogs run faster than rabbits.
I don’t think maths is more important than physics.
B.表示A不如B。用句型：less + adj./adv.原级表示。如：
Rabbits ran less fast than dogs.
Jenny is less clever than her sister.
It rains less often here in autumn than in spring.
3） A is three(four …)times the size(height,length,width,depth,…)of B.
e.g. The new building is four times the size of the old one.
注意：一倍用：once 二倍用：twice/double 三倍及以上使用：three/four …times.
4） 形容词和副词的比较等级的特殊用法：
A.“越来越……”
e.g. You are growing taller and taller.
English is becoming more and more important.
B. “越……,越……”
e.g. The harder you push the more quickly the cart will move.
The more careful you are, the better you will do in the exam.
C.“两者之中比较……的一个”：用of 引导，比较级前加上the,如：
Jack is the taller of the two brothers.
D.no more than e.g. She has on more than one yuan in her pocket.
E.no more …than.
e.g. He is feeling no better than yesterday.他觉得不比昨天好多少。（即今天昨天感觉都不好）
She is not more generous than her younger sister. 她不如她妹妹那样慷慨大方。=She is not so generous as her young sister.
F.no less than
e.g. I have no less than ten dictionaries.我起码有十本字典。
I have not less than ten dictionaries. 我具有的词典不少于十本。
G．no less…than
e.g. She is no less diligent than you.
H.不用比较级形容词的比较，如：senior, junior, superior, inferior等。
e.g. Mr Smith is three years senior to his wife.
I：He is more wise than diligent.与其说他勤奋， 不如说他更聪明。
注意：
Farther和 further主要指“距离”和“时间”的比较，表示“更远”；further和furthest指“程度”，表示“更进一步”。
elder和eldest是用来表示家族关系的长幼顺序，只作定语形容词；older和oldest表示年龄的比较，以及事物的新旧，既可以作定语形容词又可以作表语形容词。
later和latest指时间的先后，但latter和last指顺序的先后。
Activity 2: Work in pairs
Answer the questions.
1. What is wrong with this sentence?
I went there two times.
2. If object A is 10 metres long, and object B is twice as long as object A, how long is object B?
3. If object A weighs 100 kilogrammes, and object B is four times heavier, how heavy is object B?
Activity 3: Discovery
Look at these sentences.
1. Come a bit closer.
2. We need rather more than that.
3. It weights a little more than before.
4. It’ll be a lot heavier than magnesium.
5 Is it any heavier?
6. We need a piece which si very much bigger than that.
A. underline the comparative expressions.
B. Circle the adverbs used to give more information about the comparative expressions.
Summary: 英语中常见的用来修饰比较级的词/词组
1.a little, a bit, rather 比……一点
e.g. He is a little taller than his brother.
2. much , a lot, lots, far, a great/ good deal 比……得多
e.g. This book is much more instructive than that one.
Things were far worse than expected.
3.even, still, yet 比…… 更….., 愈…..
e.g. He is even fatter than his father.
This river is wide but that river is wider still.(=still wider)
still 有时可置于比较级之后,其条件是:比较级单独使用,后面没有than从句．
4.分数,百分数,倍数及有关时间\长度\重量等的名词修饰比较级\表示比较的程度.
e.g. She is a head taller than I.
My elder brother is two years older than I.
5.表”并不”,”和…….一样不”no 或not any
e.g. He is no richer than I.=He is as poor as I.
6.some 或any 修饰比较级,但多用于more 之前, some 用于表建议或请求的问句中,any 用于否\疑问句中.
e.g. Are you feeling any better?
Would you like some more rice?
Much/a little/a bit +more +uncountable noun.
many/a few/num.+more +countable noun.
e.g. He has made much more progress than anyone else in his class.
7.by far 修饰比较级注意位置：在比较级或最高级形容词或副词之后／或在有the或a 的比较级或最高级词句前或后．译为：大量；…….得多,非常，最…
e.g. She is the best by far. =She is by far the best.
e.g. His explanation is clearer by far.
He is by far the taller of the two brothers.
His handwriting is better by far than that of any other student in his class.
The Pacific is by far the largest ocean.
Far from :远非=not at all
e.g. He’s far from pleased with your work.
Post-task:
Activity 1: write the sentences.
Do activity 2 on page 47.
Do activity 2 on page 43.
Summary and question times: Recall what we have learnt.
Homework: Do the exercises 1,2,3 and 4 on page 91-92 in the workbook.
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