BBC news 2009-10-06 加文本

1.Iraqi police say a suicide bomber has attacked a group of mourners in the city of Haditha, northwest of Baghdad, killing at least six people.

参考翻译：伊拉克警方表示，一名自杀式爆炸者袭击了巴格达西北部哈迪塞的送葬者，造成至少6人死亡。

语法讲解：文中出现了多处现在分词做状语的情况，下面做详细讲解。

现在分词作状语时, 通常都表示主语正在进行的另一动作, 来对谓语表示的主要动作加以修饰或作为陪衬.

I ran out of the house shouting.

I got home, feeling very tired.

Driving to Chicago that night, I was struck by a sudden thought.

现在分词短语有时可以用作状语表示原因, 相当于一个表示原因的状语从句.

Not knowing her address, we couldn’t get in touch with her.

Seeing nobody at home, she decided to leave them a note.

Having already seen the film twice, she didn’t want to go to the cinema.

现在分词短语有时可用作时间状语, 相当于when引起的从句:

Seeing those pictures, he couldn’t help thinking of those memorable days they spent together.

如果两个动作是完全同时发生的, 多用when 或while加分词这种结构.

Be careful when crossing the street.

When leaving the airport, they waved again and again to us.

She got to know them while attending a conference in Beijing.

2.Asked if Mr. Zelaya could serve out his single term as president, he said anything was possible, but only after a new president has been elected in polls scheduled for November.

参考翻译：当被问到塞拉亚能否完成本届任期时，米切莱蒂表示一切皆有可能。但是只能是在定于11月份举行的民意调查选举出新的总统之后。

语法讲解：Asked在这里是过去分词做状语。

only倒装

only引导的词组或句子放在句首作状语时，通常要用倒装结构。如
Only in this way can you solve the problem.
只有通过这种方式你才能解决问题。
Only if you study hard can you pass the exam.
只有努力学习才能通过考试。
Only then did I realize my mistake.
只有那时我才意识到错了。

3.The scientists found that these caps and the enzyme they are made of plays a crucial role in the life of the cell.

参考翻译：这几位科学家发现，这些端粒和组成他们的酶对于细胞的生命起着非常重要的作用。

结构分析：they are made of是定语从句，修饰enzyme。play a role表示发挥关键作用。