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　由于定語從句的結(jié)構(gòu)和用法比較復(fù)雜，初學(xué)者在使用時(shí)往往容易犯一些錯(cuò)誤，最常見的有如下七種：

　(一)、在定語從句中加了多余的定語。如：　

1．誤：Some of the boys I invited them didn’t come．

　正：Some of the boys I invited didn’t come．

　譯：我邀請(qǐng)的男孩中有幾個(gè)沒有來。

　析：應(yīng)刪去them，因?yàn)閺木涞馁e語是省略了的whom，who或that。

(六)、定語從句與同位語從句

　定語從句相當(dāng)于形容詞，它對(duì)先行詞起修飾、描述或限制作用，而同位語從句則相當(dāng)于名詞，它對(duì)其前面的詞給予說明或作進(jìn)一步解釋，即說明該詞所表示的具體內(nèi)容。例如：

　The news that we heard is not true.(定語從句)

　The news that he won the prize is not true.(同位語從句)

　另：在"have no idea+從句"結(jié)構(gòu)中，其從句都作idea的同位語。例如：

　I have no idea when she will be back.

(五)、定語從句中的先行詞

　Is this book the one that you bought yesterday?

　Is this the book that you bought yesterday?

　第一個(gè)句子中，this book是主句的主語，the one 是先行詞。在第二個(gè)句子中this是主句的主語，the book是先行詞。一定要避免出現(xiàn)：Is this book that you bought yesterday?

(四)、定語從句與狀語從句

　He found the books where he had put.

　He found the books in the place where he had put.

　第一個(gè)句子為狀語從句，where he had put 作主句He found the books 的地點(diǎn)狀語。第二個(gè)句子為定語從句，where引導(dǎo)從句修飾the place。

　This is such an interesting book that I'dlike to read it.

　This is such an interesting book as I'd like to read.

　第一個(gè)句子為結(jié)果狀語從句，在結(jié)果狀語從句中，it指代book,作read的賓語。第二個(gè)句子為定語從句，關(guān)系代詞as指代先行詞book的定語從句中read的賓語。

(三)、定語從句與并列結(jié)構(gòu)

　He has two sons,neither of whom looks like him.

　He has two sons,and neither of them looks like him.

　I've got two sisters.Both of them are in Shanghai.

　第一個(gè)句子為定語從句，關(guān)系代詞whom指代two sons,在定語從名中介詞of的賓語。第二個(gè)句子為并列結(jié)構(gòu)，由并列連詞and連接，人稱代詞them指代two sons。第三個(gè)為兩個(gè)獨(dú)立的句子，兩個(gè)句子中間用句號(hào)，兩句開頭的處一個(gè)字母都大寫。

(二)、定語從句與強(qiáng)調(diào)結(jié)構(gòu)

　It is the place where they lived before.

　It is in the place that they lived before.

　第一個(gè)句子為定語從句，where指代the place,在定語從句中作狀語，第二個(gè)句子為強(qiáng)調(diào)結(jié)構(gòu)，強(qiáng)調(diào)in the place,that沒有意義，把in the place 放回后面句子，句子意思完整。

　Where is it that he found the lost watch?(強(qiáng)調(diào)句型，強(qiáng)調(diào)疑問副詞where)。

　Where is the watch that he found yesterday.(定語從句，that指代the watch)

　 定語從句又稱為關(guān)系從句，是最常見的從句之一，每年高考題對(duì)之均有考查。

(一)、定語從句中關(guān)系代詞與先行詞的一致性

　定語從句中關(guān)系代詞一般應(yīng)與它所指代的先行詞的單復(fù)數(shù)保持主謂一致。例如：

　The students who were here just now are from No,2 Senior Middle School.

　但注意下列一組句子：

　He is the only one of the students who was here just now.

　He is one of the students who were here just now.

　如果"one of +復(fù)數(shù)名詞"后跟有定語從句，一般情況下"one of"后的復(fù)數(shù)名詞為先行詞，但當(dāng)one前有the only,the very,just the修飾時(shí)，先行詞則為one。

2．As引導(dǎo)的非限制性定語從句的位置

　as引導(dǎo)的非限制性定語從句位置較靈活，可以位于主句前面．中間或后面，一般用逗號(hào)與主句隔開，但which所引導(dǎo)的非限制性定語從句只能放在主句之后。例如：

　(1) As is expected, the England team won the football match.

　(2) The earth runs around the sun, as is known by everyone.

1. 引導(dǎo)限制性定語從句和非限制性定語從句

　 (1)as多與such 或the same連用，可以代替先行詞是人或物的名詞。

　 (2)as 也可單獨(dú)使用，引導(dǎo)非限制性定語從句，作用相當(dāng)于which。例如：

The elephant’s nose is like a snake, as anybody can see.

　 (3)the same… that與 the same …as在意思上是不同的。

3.　先行詞與定語從句隔離

　定語從句一般緊跟在先行詞之后，但定語從句與先行詞之間有時(shí)也會(huì)插入別的成分，構(gòu)成先行詞與定語從句的隔離。例如：

　1) This is the article written by him that Is poke to you about..

　2) He was the only person in this country who was invited