【句子轉換】

1. 他被任命為主席，在那個位置上他度過了余生。

He was appointed chairman, in which post he spent the rest of his life.

= He was appointed chairman and in that post he spent the rest of his life.

2. 他發了脾氣，在那個時刻我決定回家。

He lost his temper, at which point I decided to go home.

= He lost his temper and at that point I decided to go home.

3. 在家里，他好像十點半之后才有空，到那時孩子們已上床睡覺了。

At home, he never seems to have time until after 10:30 pm, by which time his children have gone to bed.

= At home, he never seems to have time until after 10:30 pm, and by that time his children have gone to bed.

4. 我們做了三年隔壁鄰居，在此期間我們只見過兩次面。

We were next-door neighbors for three years, during which time we met only twice.

= We were next-door neighbors for three years, and during this / that time we met only twice.

5. 被告知我的工作不能令人滿意，聞訊后我便遞交了辭呈。

I was told my work was unsatisfactory, at which point I submitted my resignation.

= I was told my work was unsatisfactory, and at this / that point I submitted my resignation.

6. 他在學習經濟學，這門知識在當今非常重要。

He is studying economics, which knowledge is pretty important today.

= He is studying economics, and this knowledge is pretty important today.      

■after / before which 引導的定語從句

and after / before that = after / before which

【典型例題1】

He was educated at a local grammar school, _______ he went on to Cambridge.

A. from which                        B. after that   

C. after which                        D. from this

【解析】句意：他在當地一所文法學校上學，之后他便去了劍橋。after that意為“然后，之后”，但不能引導一個定語從句，因此B項也被排除；after which相當于and after that，故此句可改寫為：

He was educated at a local grammar school, and after that he went on to Cambridge.

【典型例題2】

He left his hometown 20 years ago, _______nothing was heard about him.

A. since when                         B. after that   

C. after which                        D. from this

【解析】句意：20年前他離開家鄉，從那以后再沒有他的消息。Since when與與過去時態不吻合，需要用完成時；B,D不能接定語從句，所以C正確。本句改寫成：

He left his hometown 20 years ago and after that nothing was heard about him.

句子轉換

我在東關中學工作了九年，之前我在光明中學工作。

I worked in Dongguan Senior Middle School for 9 years, before which I worked in Gunagming Senior Middle School.

= I worked in Dongguan Senior Middle School for 9 years, and before that I worked in Gunagming Senior Middle School.

【小結點撥】

根據上述學習內容，做出如下總結：

1.帶有this, that的短語，引導定語從句時，要將this, that變為 which。

2.帶有then, now的短語，引導定語從句時，要將then, now變為when。

鞏固練習：

1.He believes in public ownership, ______ idea I quite opposed to.

A. this                   B. that                  C. which                D. what

2.The baby is due in May, _______ the new house should be finished.

A. by then              B. by which         C. by when            D. since when

3.Mark was a student at this university from 1999 to 2003, _______ he studied very hard and was made Chairman of the Students’ Union.(www.hz123456.com)

A. during which time                           B. for which time   

C. during whose time                           D. by that time

4. The new China was founded in 1949, _______ great changes have taken place.

A. when                   B. during which   C. since then            D. since when

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