专题07 定语从句（二）-2020年高考英语语法考点讲解与真题分析

2020年高考语法考点讲解与真题分析 07 定语从句（二） 考点二 “介词+关系代词”引导定语从句 “介词+关系代词”在从句中作定语或状语。能用于这一结构的关系代词只有whom, which, whose三个，whom, which作宾语，whose作定语。这一结构的中介词由两个方面来确定：与先行词的搭配；与从句谓语动词的搭配。 1. We choose this hotel because the price for a night here is down to $20, half of ________ it used to charge. （2017江苏） A. that           B. which         C. what        D. how 【答案】B 【解析】这里是“介词+关系代词”引导的定语从句，排除C、D；“介词+关系代词”中，关系代词不能用that，故选B。 2. In 1963 the UN set up the World Food Programme, one of __________ purposes is to relieve worldwide starvation. （2017江苏） A. which              B. its           C. whose           D. whom  【答案】C 【解析】这里是“介词+关系代词”引导的定语从句，关系词在从句中作定语，修饰purpose，故用关系代词whose。 3. Many young people, most _________ were well-educated, headed for remote regions to chase their dreams. （2016江苏） A. of which  B. of them  C. of whom  D. of those 【答案】C 【解析】这里是“介词+关系代词”引导的定语从句，排除B、D；关系代词指代people，故用关系代词whom。 4. Creating an atmosphere ______ employees feel part of a team is a big challenge. (2015浙江) A. as B. whose C. in which D. at which 【答案】C 【解析】这是一个含有定语从句的复合句，关系词在从句中作状语，只能用“介词+关系代词”，先行词是atmosphere，表示“在……氛围中”，应用介词in。 5. Some experts think reading is the fundamental skill upon ______ school education depends. (2015安徽) A. it B. that C. whose D. which 【答案】D 【解析】这里是“介词+关系代词”引导的定语从句，关系代词指作宾语，故用which。 注意： which引导定语从句在从句中一般不作定语，但在“介词+关系代词”引导的定语从句中，which可替代指示代词作定语。例如： He may win the competition, _________he is likely to get into the national team. (2013辽宁) A. in which case B. in that case C. in what case D. in whose case 【答案】A 【解析】这里是“介词+关系代词”引导的定语从句，关系代词指替代指示代词that在从句中作定语。定语从句写成一个完整的句子是：In that case, he is likely to get into the national team. 考点三 关系代词as引导定语从句 关系代词as可以引导限制性或非限制性定语从句，并在从句中作主语，宾语或表语。as 常用来引导非限制性定语从句，as指代整个主句，表示“正如”； as引导限制性定语从句只有两种情况，一是先行词前有such修饰，二是先行词前有the same修饰。 1. The number of smokers, _____ is reported, has dropped by 17 percent in just one year. (2015江苏) A. it B. which C. what D. as 【答案】D 【解析】解析： 这是一个含有一个非限制性定语从句的复合