六年级-比较级与最高级的用法

课前准备：检查学生掌握单词情况（听写）

一、形容词、副词的比较级和最高级的构成规则

1．一般单音节词和少数以-er，-ow结尾的双音节词，比较级在后面加-er，最高级在后面加-est；

（1）单音节词

如：small→smaller→smallest short→shorter→shortest

tall→taller→tallest great→greater→greatest

（2）双音节词

如：clever→cleverer→cleverest narrow→narrower→narrowest

2．以不发音e结尾的单音节词，比较在原级后加-r，最高级在原级后加-st；

如：large→larger→largest nice→nicer→nicest able→abler→ablest 3．在重读闭音节（即：辅音＋元音＋辅音）中，先双写末尾的辅音字母，比较级加-er，最高级加-est；

如：big→bigger→biggest hot→hotter→hottest fat→fatter→fattest 4．以“辅音字母＋y”结尾的双音节词，把y改为i，比较级加-er，最高级加-est；

如：easy→easier→easiest heavy→heavier→heaviest

busy→busier→busiest happy→happier→happiest

5．其他双音节词和多音节词，比较级在前面加more，最高级在前面加most；

如：beautiful→more beautiful→most beautiful

different→more different→most different

easily→more easily→mo st easily

注意：（1）形容词最高级前通常必须用定冠词 the，副词最高级前可不用。

例句： The Sahara is the biggest desert in the world.

（2）形容词most前面没有the，不表示最高级的含义，只表示"非常"。

It is a most important problem.

=It is a very important problem.

6．有少数形容词、副词的比较级和最高级是不规则的，必须熟记。

如：good→better→best well→better→best

bad→worse→worst ill→worse→worst

old→older/elder→oldest/eldest

many/much→more→most little→less→least

far →further/farther→ furthest/farthest

词形变换。

比较级最高级

large _________________ ___________________

fast _________________ ___________________

easy _________________ ___________________

wet _________________ ___________________

good _________________ ___________________

important _________________ ___________________

well __________________ ___________________

bad _________________ ___________________

many _________________ ___________________

little _________________ ___________________

far _________________ ___________________

strong _________________ ___________________

patient _________________ ___________________

safe _________________ ___________________

expensive _________________ ___________________

二、形容词、副词的比较级和最高级的句子公式：

比较级

形容词物体A + am / are / is + 形比 + than + 物体B.

I am taller than you.

Pasta is more delicious than pizza.

副词物体A + 行为动词 + 副比 + than + 物体B.

Cheetahs run faster than goats.

He studies better than me.

最高级

1）物体A + am / are / is + the + 形最高级 + 比较范围（of + 人/物，in +地方）.

I am the tallest in the class.

Pasta is the most delicious food of the three.

2）物体A + 行为动词 + 副词最高级 + 比较范围（of + 人/物，in + 地方）. Cheetahs run fastest in the world.

He studies best of us.