及物動詞用在主動語態(tài)時要有賓語，因此可以變?yōu)楸粍诱Z態(tài)；不及物動詞用于主動語態(tài)時不能接賓語，因此無被動語態(tài)。

1. The two thieves have been disappeared.

disappear 為不及物動詞，因此不能用于被動語態(tài)。所以把 been去掉。

2. The building built now will be our teaching building.

表“現(xiàn)在正在建的”應(yīng)用被動語態(tài)的正在進(jìn)行時，因此在built 前加being。

3. He is being operated by the famous doctor.

主動語態(tài)變?yōu)楸粍诱Z態(tài)時，應(yīng)注意短語動詞的完整性，別忘了介詞或副詞。“給…做手術(shù)”應(yīng)為operate on sb，所以在operated 后加上on。

4. I wonder if the doctor has been sent.

原因同上，應(yīng)在sent 后加上for。

5. The book written by him is sold well.

說一本書暢銷是指書本身的屬性，因此不用被動語態(tài)。本句應(yīng)改為：The book written by him sells well.

6. This history book is worthy reading.

“值得被做”可以有如下幾種說法：be worth doing; be worthy of being done; be worthy to be done. 因此本句應(yīng)該為：This history book is worthy to be read.

非謂語動詞

1. We are going to talk about the problem discussing at the last meeting.

此處為分詞作定語，問題應(yīng)該被討論，所以把discussing改為discussed。

2. The girl dressed herself in red is my sister.

dress為及物動詞，意為“給…穿衣服”，此處為分詞作定語修飾girl, girl應(yīng)是它的邏輯賓語，因此把herself去掉。

3. Being seriously ill, his class-mates sent him to hospital.

分詞作狀語時，其邏輯主語為這句話的主語，此句應(yīng)為“因?yàn)樗×?，他的同學(xué)才把他送到醫(yī)院去”，因此把前半句改為：He being seriously ill.

4. Having not seen her for many years, we could hardly recognize her.

現(xiàn)在分詞的否定應(yīng)把not放在現(xiàn)在分詞前面，所以前半句應(yīng)改為：Not having seen her for many years.

5. Seeing from the space, the earth looks like a ball.

分詞作狀語，其邏輯主語應(yīng)是這句話的主語，此句中地球應(yīng)該被看，所以把Seeing 改為Seen。

6. English is easy to learn it.

此句中是不定式作狀語修飾easy, English應(yīng)該是learn的邏輯賓語，所以把it去掉。

7. I will get somebody repair the recorder for you.

“讓某人做某事”可以有以下幾種表達(dá)法：make sb do sth; have sb do sth; get sb to sth. 因此在repair 前加to。

8. She decided to work harder in order to not fall behind the others.

不定式的否定把not放在to前面。因此應(yīng)改為：She decided to work harder in order not to fall behind the others.

9. It’s better to laugh than crying.

表比較時比較的雙方應(yīng)為同種結(jié)構(gòu)，或都是名詞或都是不定式。因此有兩種改法：It’s better to laugh than to cry 或 It’s better laughing than crying.

10. It’s no use to send for the doctor.

做某事是沒用的要說成It’s no use doing,所以把to send 改為sending。

11. She practices to play the piano after school every day.

practise 后只跟動名詞作賓語，因此把to play 改為playing。

12. When the teacher came in, he stopped listening to the teacher.

stop doing 為停止做這件事，而stop to do 為停下來正在做的事去做這件事。所以后半句應(yīng)該為：he stopped to listen to the teacher.

名詞性從句

1. We are talking about if this plan should be carried out.

If 和whether都可以引導(dǎo)動詞的賓語從句，如果從句做的是介詞賓語，只能用whether引導(dǎo)。所以把if 改為whether。

2. I can not decide if to stay or not.

只有whether才能和不定式搭配使用。因此把if 改為whether。

3. My suggestion is we try for a second time.

表語從句的引導(dǎo)詞如為that，一般不省略。因此在we前加上that。

4. What will the professor say is not known yet.

名詞性從句的語序都是陳述句語序。因此應(yīng)改為：What the professor will say is not known yet.