2.定語(yǔ)從句與同位語(yǔ)從句的區(qū)別
同位語(yǔ)從句大多由連接詞that引導(dǎo)，常跟在下列名詞后面，如fact，idea，opinion，news，hope，belief等。同位語(yǔ)從句用來(lái)解釋說(shuō)明這些名詞的具體含義和內(nèi)容。定語(yǔ)從句對(duì)所修飾的名詞加以修飾限定，即說(shuō)明其為此人(事物)而非彼人(事物)。如：
We are familiar with the idea that all matter consists of atoms.(同位語(yǔ)從句)
The news that we are invited to the party is very encouraging.(同位語(yǔ)從句)
This is the best article that has been written on the subject. (定語(yǔ)從句)
4.定語(yǔ)從句與what引導(dǎo)的名詞性從句的區(qū)別
what只能引導(dǎo)名詞性從句，在從句中充當(dāng)主語(yǔ)、賓語(yǔ)或表語(yǔ)，但總是包含著定語(yǔ)從句的含義，很容易與定語(yǔ)從句混淆。定語(yǔ)從句的引導(dǎo)詞前面都會(huì)有先行詞，而what前面則沒(méi)有任何先行詞，此時(shí)what=先行詞+that。試比較：醫(yī)學(xué).全在線gydjdsj.org.cn
He always means what he says.
That's the only thing that he says.
That's what I want to say.
That's all (that) I want to say.
This is what I can give you.
This is all the money that I can give you.
(二)比較狀語(yǔ)從句
1.比較狀語(yǔ)從句的種類(lèi)
(1)同級(jí)比較。
英語(yǔ)中表示同級(jí)比較的詞有as+形容詞或副詞原形+as；the same as，not so+形容詞或副詞原形+as(不如…)等。
例1：Do you enjoy listening to records? I find records are often _____, or better than an actual performance. (1996.1)
�。跘］ as good as［B］ as good［C］ good［D］ good as
答案為［A］。這里的as good as和better than 由or連接，構(gòu)成并列關(guān)系。
例2：The elimination of inflation would ensure that the amount of money used in repaying a loan would have _____ as the amount of money borrowed.
�。跘］ as the same value［B］ the same value［C］ value as the same［D］ the value is the same
答案為［B］。the same...as為固定用法。
(2)差級(jí)比較。
英語(yǔ)中的差級(jí)比較，僅限于兩者之間，常由形容詞或副詞的比較級(jí)形式+than 構(gòu)成。此外還需要注意以下幾點(diǎn)：
�、傧啾容^的內(nèi)容在語(yǔ)法形式或結(jié)構(gòu)上要保持一致。
英語(yǔ)中，為了避免重復(fù)通常用that，one，those來(lái)代替前文出現(xiàn)的同類(lèi)事物，其中that可以代替可數(shù)名詞和不可數(shù)名詞，而one只能代替單數(shù)可數(shù)名詞，those只能代替復(fù)數(shù)可數(shù)名詞。如：
No bread eaten by man is so sweet as _____ earned by his own labour. (1994.8)
�。跘］ one［B］ that［C］ such［D］ what
答案為［B］。that代替的是不可數(shù)名詞bread。
�、诒硎颈稊�(shù)的比較形式常為：修飾語(yǔ) + as...as.../more...than...。有時(shí)第二個(gè)as，than后面的比較內(nèi)容會(huì)省略。例如：
Smoking is so harmful to personal health that it kills _____ people each year than automobile accidents. (1999.2)
�。跘］ seven more times［B］ seven times more［C］ over seven times［D］ seven times
答案為［B］。倍數(shù)+ more ...than...為固定結(jié)構(gòu)。
