雅思阅读长难句精讲：主语从句 (2)

雅思阅读长难句

It will never be known how and when this numeration ability developed, but it is certain that numeration was well developed by the time humans had formed even semi-permanent settlements.

雅思阅读长难句专家解析

【难点】

这个句子整体上是个并列句，这一点我们可以根据but来判断，前后都是独立的句子，是两个并列的子句。在这两个并列子句中都分别有个主语从句，句式还是比较整齐的。在第二个并列句中，还有一个状语从句，也就是humans had formed even semi-permanent settlements。大家在分析这个句子的时候，要先找到两个并列的子句，然后将子句中的主语从句找到，这样分析起来就会容易得多。

【子句拆分】

并列句1：It will never be known something.
主语从句1：How and when this numeration ability developed.
并列句2：It is certain something.
主语从句2：Numeration was well developed.
状语从句：Humans had formed even semi-permanent settlements.

【成分划分】

并列句1：It [形式主语] will [谓语] never [状语] be known [谓语] something. [主语]
翻译：某事永远不会被知道。

连接词：HOW AND WHEN
主语从句1：This numeration ability [主语] developed. [谓语]
翻译：这种计数能力是怎样以及何时开发的。

连接词：BUT
并列句2：It [形式主语] is [系动词] certain [表语] something. [主语]
翻译：某事是可以肯定的。

连接词：THAT
主语从句2：Numeration [主语] was well developed. [谓语]
翻译：计数方法已经很发达了。

连接词：BY THE TIME
状语从句：Humans [主语] had formed [谓语] even semi-permanent settlements. [宾语]
翻译：人类已经形成稳定的半永久式定居模式。

【全句翻译】

人们永远不会知道这种计数能力是怎样以及何时开发的，但是可以肯定的是，当人类已经形成稳定的半永久式定居模式时，计数方法已经很发达了。

雅思阅读长难句知识点梳理

主语从句

在主从复合句中充当主语的句子是主语从句。
① It is certain that he will win the match.
② What caused the accident remains unknown.

并列句

并列句是构成并列复合句的简单句。
① I like action movies but I don't like thrillers.
② Take the chance, or else you will regret it.