Module5 A Lesson in a Lab教案
⒉we’ve finished studying passage a and passage b on page44-45.
⒊we’ve known how to carry out a scientific experiment in a lab successfully and write a complete scientific experiment report in simple english
period 4
grammar : degrees of comparison
teaching objectives:
to make the students grasp the usage of the degrees of comparison.
important and difficult points:
⒈ to have the ss understand all kinds of forms of degree of comparison.
⒉ to enable the students to know how to use the degrees of comparison correctly.
teaching procedures:
step 1. lead-in
present the ss the following sentences on the bb and ask them to discover what kind of degrees of comparison .
⑴jack speak english as fluently as tom.
⑵this school is better than that one.
⑶this book is more interesting than that one.
⑷this room is less beautiful than that one.
⑸the weather is getting hotter and hotter.
⑹the harder you study, the more you will make progress.
⑺he works (the) hardest in his class.
then call the answers from the class.
answers: 1.原級; 2、3、4、5、6、均為.比較級; 7.最高級.
step 2. grammar structure
firstly ask the ss to make a summary about the structures of the degrees of comparison. then check the answers.
answers：3 forms ——原級、比較級和最高級。
step 3. detailed notes about grammar usage
⒈原級的構成和用法
1）構成：形容詞和副詞的原級形式是形容詞和副詞的原形。
2）用法：當表示雙方在程度、性質、特征等某方面相等時，用“as+原級adj./adv.+as”的結構；當表示雙方不相等時，用“not as(so)+ 原級adj./adv.+as”的結構；當表示一方是另一方的若干倍時，用“倍數+as+原級adj./adv.+as”的結構。例如：
①he is as tall as jack. // i speak english as fluently as you.
②your bike is not as(so) new as hers.
③this road is three times as long as that one.
⒉比較級和最高級的構成和用法
1）構成：
⑴規則變化
①單音節形容詞以及少數以－er,－or結尾的形容詞和副詞加＂er＂，＂est＂.例如：
fast-faster-fastest; few-fewer-fewest; great-greater-greatest;
clever-cleverer-cleverest norrow-norrower-norrowest.
②以e結尾的單音節形容詞和副詞后以及少數以-ble,-ple結尾的雙音節形容詞和副詞后，加＂r＂，＂st＂.例如：
large-larger-largest, able-abler-ablest, simple-simpler-simplest
③以一個輔音結尾的單音節形容詞，其前面的元音字母發短元音時，該輔音字母要雙寫，然后加＂er＂，＂est＂.例如：
hot-hotter-hottest
④以輔音加y結尾的形容詞和少數不是形容詞加ly構成的副詞要將y改寫為i，再加＂er＂，＂est＂.例如：
easy-easier-easiest, happy-happier-happiest early-earlier-earliest