語法改錯練習

　　必做：

　　1.The city was taken,the inhabitants fled.

　　2.A man escaped from the prison last night.It was a long time when the guards discovered what had happened.

　　選做★：You can arrive in Beijing earlier for the meeting unless you don’t mind taking the night train.

　　答案解析：

　　1.【解析】應該將was taken改為having been taken。該題考察獨立主格結構的用法。

　　2.【解析】應該將when改為before。該題考點為句型“It is/was/will be…(time)before….”的用法，意為“過了…(時間)才…”

　　選做★：【解析】應該將unless改為provided。該題考察引導條件狀語從句的連詞。此處provided可以當if理解和使用，用unless不合題意。

　　難句翻譯

　　必做：

　　1.The wise old King praised the boy with his pot empty because the boy did not want to cheat him by showing him some flowers cultivated by others.

　　2. You can arrive in Beijing earlier for the meeting unless you don’t mind taking the night train.

　　選做★：If it could be established that life arose independently on Mars and Earth, the finding would provide the first concrete clues in one of the deepest mysteries in all of science: the prevalence of life in the universe.

　　答案及解析

　　1.【解析】該題考點為with+賓語+形容詞作定語的用法。

　　【句意】英明的老國王表揚了拿著空罐子的男孩，因為男孩沒有用別人種出來的花來欺騙他。

　　2.【解析】應該將unless改為provided。該題考察引導條件狀語從句的連詞。此處provided可以當if理解和使用，用unless不合題意。

　　選做★：【妙譯】如果能夠證明生命獨立地存在于火星和地球上，這一結果會對所有科學的最深層奧妙，即宇宙中生命是普遍存在的提供最早的具體線索。

　　【點撥】本句為復合句，在由if引導的條件狀語從句中it作形式主語，that引導主語從句;主句中冒號后面是說明成分，用來說明mysteries