Section Ⅳ　Grammar & Writing

　　形容词/副词的比较级

　　观察下列从Introduction和Grammar 2中选取的句子，体会形容词比较级的用法。

　　1．The earth is twice as large as the moon.

　　2．The earth is forty­nine times larger than the moon.

　　3．It's getting brighter and brighter!

　　4．The closer you are，the more you'll see.

　　5．The more books I read，the more information I learn.

　　一、形容词或副词比较级的基本用法

　　1．同级比较：表示两者程度相同。

　　(1)．..as＋形容词/副词＋as..."和......一样"

　　(2)．..not as/so＋形容词/副词＋as..."和......不一样；不如......"

　　(3)as many/much＋名词＋as"和......一样多"

　　as＋形容词＋a/an＋单数名词＋as"和......一样"

　　Tom runs as fast as Mike.

　　汤姆和迈克跑得一样快。

　　This room is not as/so big as that one.

　　这个房间不如那个大。

　　I have as many books as Tom.

　　我有跟汤姆一样多的书。

　　She is as good an actress as she is a singer.

　　她当演员和当歌手都一样出色。

　　2．比较级：用于两者间的比较，表示"比......更......"。句型为：形容词/副词比较级＋than...

　　She is younger than my sister.

　　她比我妹妹年轻。

　　She speaks louder than her mother.

　　她比她妈妈说话声音大。

　(1)使用比较级时比较的对象应该相同。为了简洁起见，可用that代替前面出现的