as...as“像……一样”,引导比较状语从句。
as...as同级比较的形式有:
as+adj./adv.+as ; as+adj.+可数名词复数形式或不可数名词+as
as+adj.+a/an+可数名词单数形式+as
注意:(1)同级比较的否定形式为 not so/as...as...。
(2)同级比较可修饰倍数、百分数、分数等。
(3)此结构中第二个 as可为连词也可为介词,做连词可引导一个比较状语从句,从句常用省略形式;做介词时,后接名词,也可接数量词表示某性质达到了什么程度。
①Asia is about four times as large as Europe.亚洲大约是欧洲的四倍大。
②He owed as many thanks to his parents as (he owed) to his teachers. 他同样地感谢他的父母和老师。
③We walked as far as the lake last night.
昨晚我们散步远到湖边。
④He is not so friendly to me as I am to him. 他对我不像我对他那样友好。
⑤You must give flowers as much water as they need. 你必须给花浇足够多的水。
(1)—What do you think of French? —In my opinion, French is ______ English.
a subject so difficult as
B.as difficult a subject as
C.as a subject difficult as
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