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       一、 复合句的品种

　　英语的复合句一般分为三大类型：名词性从句、描述词性从句和副词性从句。

　　(一) 名词性从句

　　在整个复合句中起名词效果，充任主语、宾语、表语和同位语等的各种从句，统称为名词性从句。名词性从句主要有以下几种：

　　1. that 引导的从句 e.g. It is reported that one third of Guangzhou citizens plan to buy a private car. (据报道，三分之一的广州市民计划购买私家车。)

　　2. whether/if 引导的从句 e.g. Whether motorcycles should be banned in Guangzhou has become an issue of controversy.(广州是否禁摩托车成了有争议的论题。)

       3. how/why/when/where引导的从句 e.g. This essay aims to explore why so many white collar workers suffer from insomnia. (本文将讨论为什么这么多白领失眠的原因。)

　　4. who/whom/whose/what/which引导的从句 e.g. Who should be responsible for the environmental degradation is still unknown.(谁对环境恶化负责还不清楚。)

　　(二) 描述词性从句

　　具有描述词功用，在复合句中做定语的从句被称之为描述词性从句或定语从句。被修饰的名词、词组或代词被称为先行词。描述词性从句分为两品种型：

　　(1)由联系代词 who, whom, whose, that, which, as引导的从句。 例如: People who are strongly against human cloning claim that it is immoral and unethical. (激烈对立克隆人的人们认为这样做不道德和不合伦理)