BBC news 2010-11-01 加文本

1.The authorities in Yemen have freed a student, Hanan Al-Samawi, who’d been held on suspicion of sending the parcel bombs found on cargo planes in Britain and Dubai last week.

这句话的主干是前面半句。who’d been held是定语从句，修饰Hanan Al-Samawi。found on cargo planes是过去分词做后置定语，修饰parcel bombs。

2.She’s promised to continue policies that have fostered years of strong economic growth and lifted millions out of poverty.

She’s promised to continue policies是这句话的主干。that have fostered and lifted是定语从句，修饰policies。

3.A power-sharing government over the last three and a half years has made considerable progress in restoring peace and stability, though militia groups and some rebel soldiers still haven’t been disarmed.

though，although的区别
一、从词性上看

1. 用作连词，表示“虽然”，两者大致同义，可换用，只是 although 比 though 更为正式。如：

Though [Although] it was raining，we went there. 虽然下着雨，但我们还是去了那儿。

2. although 一般不用作副词，而 though 可用作副词，且一般放在句末(不放在句首)，意为“可是”、“不过”。如：

It’s hard work; I enjoy it though. 工作很辛苦，可是我乐意干。

这样用的 though 有时可与 however 换用。如：

We all tried our best. We lost the game, though [however]. 我们都已尽了最大的力量，但我们还是输了。

二、从用法上看

1. 在 as though(好像，仿佛), even though(即使，纵然) 等固定短语中不能用 although。如：

He talks as though he knew anything. 他夸夸其谈好像无所不知。

2. though 引导的让步状语从句可用部分倒装的形式(注意：倒装后位于句首的名词之前不用冠词)，但 although 一般不这样用。如：

Poor though I am, I can afford it. 我虽穷，但这东西还是买得起的。

Child though he was, he did quite well. 他虽是孩子，但干得很好。