雅思阅读：剑桥雅思阅读长难句分析(9)_雅思英语阅读

雅思阅读：剑桥雅思阅读长难句分析(9)

　　3. It is crucial that we look at the facts if we want to make the best possible decisions for the future.

　　分析：本句主句为It is crucial that we look at the facts 其中It为形式主语，that we look at the facts为that引导的主语从句，是该句子真正的主语;if we want to make the best possible decisions for the future为if引导的条件状语从句。

　　4. Some are thermoplastic, which means that, like candlewax, they melt when heated and can then be reshaped.

　　分析：本句的主句为Some are thermoplastic which means that, like candlewax, they melt when heated and can then be reshaped.为定语从句，做thermoplastic的定语，关系词为which; 在此定语从句中that, like candlewax, they melt when heated and can then be reshaped. 为that引导的宾语从句，做means的宾语;when heated为过去分词短语做状语，做they melt的时间状语。

　　5. Baekelands interest in plastics began in 1885 when, as a young student in Belgium, he embarked on research into phenolic resins, the group of sticky substances produced when phenol combines with an aldehyde .

　　分析：本句的主句为Baekelands interest in plastics began in 1885为时间状语，而when, as a young student in Belgium, he embarked on research into phenolic resins为定语从句，做1885的定语，关系词为when; the group of sticky substances为phenolic resins的同位语;produced when phenol combines with an aldehyde combines with an aldehyde .为when引导的时间状语从句。