when的限制性定語從句

（1）定語從句有限制性和非限制性兩種。限制性定語從句是先行詞不可缺少的部分，去掉它主句意思往往不明確；非限制性定語從句是先行詞的附加説明，去掉了也不會影響主句的意思，它與主句之間通常用逗號分開。例如：·This isthe house which we bought last month.這是我們上個月買的那幢房子。（限制性）·Thehouse, which we bought last month, is very nice.這幢房子很漂亮，是我們上個月買的。（非限制性）

（2） 當先行詞是專有名詞或物主代詞和指示代詞所修飾時，其後的定語從句通常是非限制性的。例如：·CharlesSmith, who was my former teacher, retired last year.查理·史密斯去年退休了，他曾經是我的老師。·Myhouse, which I bought last year, has got a lovely garden.我去年買的那幢房子帶着個漂亮的花園。· Thisnovel, which I have read three times, is very touching.這本小説很動人，我已經讀了三遍。

（3） 非限制性定語從句還能將整個主句作為先行詞, 對其進行修飾, 這時從句謂語動詞要用第三人稱單數。例如：·Heseems not to have grasped what I meant, which greatly upsets me.他似乎沒抓住我的意思，這使我心煩。·Liquidwater changes to vapor, which is called evaporation.液態水變為蒸汽，這就叫做蒸發。説明：關係代詞that和關係副詞why不能引導非限制性定語從句。

(4) 定語從句有限制性和非限制性兩種。限制性定語從句是先行詞不可缺少的部分，去掉它主句意思往往不明確；非限制性定語從句是先行詞的附加説明，去掉了也不會影響主句的意思，它與主句之間通常用逗號分開，例如：

This is the house that we bought last month. 這是我們上個月買的那幢房子。（限制性）

The house, which we bought last month, is very nice.這幢房子很漂亮，是我們上個月買的。（非限制性）

(5) 當先行詞是專有名詞或物主代詞和指示代詞所修飾時，其後的定語從句通常是非限制性的.，例如：

Charles Smith, who was my former teacher, retired last year. 查理·史密斯去年退休了，他曾經是我的老師。

My house, which I bought last year, has got a lovely garden. 我去年買的的那幢房子帶着個漂亮的花園。

This novel, which I have read three times, is very touching. 這本小説很動人，我已經讀了三遍。

(6) 非限制性定語從句還能將整個主句作為先行詞, 對其進行修飾, 這時從句謂語動詞要用第三人稱單數，例如：

He seems not to have grasped what I meant, which greatly upsets me. 他似乎沒抓住我的意思，這使我心煩。

Liquid water changes to vapor, which is called evaporation. 液態水變為蒸汽，這就叫做蒸發。

説明：關係代詞that和關係副詞why不能引導非限制性定語從句。

練習題：

1.I know the boy ____________ you gave the book____________.

；to h；to whom；to ；to him

in is the very place ____________ I’m anxious to pay a visit.

h which which

you been to Hangzhou____________ West Lake is the most beautiful in our country？

e h e

4.I know the student ____________ you borrowed the pen.

whom which

are players from Japan，____________ are our old friends.

e

arrived at the farmhouse in front of ____________ sat a small boy.

place h

is the day ____________ I’ll never forget.

A./ which which

letter is from my sister，____________ is working in Beijing.

h

9.I bought a book，____________ I can’t remember now.

title e title title of it title of that

10.I want to use the same dictionary ____________ was used yesterday.

h

is good at English，____________ we all know.

12.I’ll never forget the days ________ we spent together in the countryside.

which h which

is the best film ____________ I have ever seen.

h that

is the only one of the students ____________ from Shanghai.

is are are come

Scott is one of the foreign experts who ____________ in China.

s working working been working

16.I，who ____________ in America，feel proud of being a Chinese.

B./ g

’ll never forget the people and the place ________ she visited in Beijing last year.

h e

you know the reason ____________ he was late？

what h which

1~5 ADABD 6~10 CACBD 11~18 BCAAC CAC

用關係代詞填空.(答案可能不唯一)（that, which, who, whom, whose）

1. These books _____________ you lent me were very useful.

2. The storybook ____________ I have just read cannot be easily forgotten.

3. A dictionary is a book _____________ gives the meaning to the word.

4. Is there anyone ____________ family is in Beijing?

5. This is the best film ________ has been shown this year.