1、形容詞表示某一事物或人的特征，副詞表示某一動作的特征。形容詞和副詞有三種形式：原形、比較

　　級、最高級。比較級：+er  最高級：the …+est

　　兩個重要特征：as……as中間一定用原形，than的前面一定要+er。

　　2、形容詞、副詞比較級的規(guī)則變化如下：

　�。�1）一般直接+er。如：tall - taller, fast - faster   單音節(jié)詞如果以-e結(jié)尾，只加-r。如：late - later

　　（2）重讀閉音節(jié)詞如末尾只有一個輔音字母，須雙寫這個字母，再加-er。如：big - bigger, fat - fatter

　�。�3）以輔音字母加-y結(jié)尾的詞，變y為i，再加-er。如：heavy - heavier, early - earlier

　　（4）雙音節(jié)和多音節(jié)詞的比較級應(yīng)在原級前加more構(gòu)成。如：beautiful - more beautiful,

　　careful - more careful, quietly - more quietly, interesting - more interesting

　�。�5）有些不規(guī)則變化的，須逐一加以記憶。如：good/well - better, bad/ill - worse, many/much - more, far - farther/further, old - older/elder…

　　練一練：

　　1、寫出下列形容詞、副詞的比較級。

　　big

　　good

　　long

　　tall

　　old

　　short

　　thin

　　heavy

　　young

　　fat

　　light

　　strong

　　high

　　far

　　low

　　early

　　late

　　well

　　fast

　　slow

　　2、用括號內(nèi)所給單詞的適當(dāng)形式填空。

　　1) I can swim as _______ ( fast ) as the fish, I think.

　　2) Look! His hands are _______  ( big ) than mine.

　　3) I think you do these things_______ ( well ) than your classmates.

　　4) Whose bag is _______ ( heavy ), yours or mine?

　　5) Does Jim run as _______（slow ) as David? Yes, but Mike runs_______ ( slow ) than them.

　　6) You have seven books, but I have _______ ( many ) than you. I ha ve ten.

　　7) I jump _______ ( far ) than some of the boys in my class.

　　8) I'm very_______ ( thin ), but she's _______ ( thin ) than me.

　　9) It gets _______and_______ ( warm ) when spring comes here.