1、人教高中英语(2019 版)1选择性必修二Unit 1 Science and scientists【主题:科学与科学家】本单元按照课文要求须掌握的语法点是“表语从句” 。1.表语从句的连接词。 (见表)1.表语从句的用法as if / as though 引导的表语从句通常位于连系动词 look,seem,feel 等之后,从句有陈述和虚拟两种语气。若所表达的意思是真实的,就用陈述语气;若表述与客观事实相反的假设,则用虚拟语气。如:It looks as if he benefits a lot from the project. 看起来他好像从这个项目中获益不少。 (陈述语气)It loo
2、ks as if / though it would rain. 看起来像是要下雨。 (虚拟语气)It seems as if it were / was spring already. 似乎已经是春天了。仿写句子that,why,because 引导的表语从句的区别 表述原因的名词 (reason, cause) 做句子主语时, 其后的表语从句常用 that 引导, 不可用 because,即构成句式:the reason / cause is that.。如:人教高中英语(2019 版)2The reason why he was late was that he missed the f
3、irst bus this morning.他迟到的原因是他今天早上没赶上第一班公共汽车。Part of the reason is that those future generations have already been watching him and taking inspirationfrom his example. 部分原因是,未来的几代人已经看过他的比赛,并从他的故事中受到鼓舞。仿写句子 because 引导的表语从句常用于 That s because.结构中, 说明产生上述结果的原因; That s why.结构中,why 引导的名词性从句说明由上述原因导致的某种结果。
4、如:I was late for school this morning. Thats because I stayed up too late last night.今天早上我上学迟到了,那是因为我昨晚熬夜太晚。 (果因)I stayed up too late last night. Thats why I was late for school this morning.我昨晚熬夜太晚,那就是我今天早上上学迟到的原因。 (因果)仿写句子主语是表示“建议、命令、要求(proposal,suggestion,command,order,advice,demand,requirement,re
5、quest) ”等的名词时,表语从句应用虚拟语气,即从句谓语动词用“should+动词原形” ,should 可省略。如:My suggestion is that we (should) set off early tomorrow. 我的建议是我们明天早点动身。His order was that all the soldiers (should) be sent to the front. 他的命令是派所有的士兵到前线。仿写句子【相关试题解析】1. The best moment for the football star washe scored the winning goal. (
6、2020 北京高考题)A. whereB. whenC. howD. why解析:本题考查表语从句引导词的选择。设空处位于系动词 was 之后引导从句,故判断此处引导表语从句。根据 the best moment 表示时间可知 when 正确。 【答案选 B】人教高中英语(2019 版)32. From space, the earth looks blue. This isabout seventy-one percent of its surfaceis covered by water.(2018 安徽高考题)A. whyB. howC. becauseD. whether解析:本题考查表语从句引导词的选择。分析前后句之间的逻辑关系,此处为“前果后因” ,应用because。 “前因后果”用 why; “前果后因”用 because。 【答案选 C】人教高中英语(2019 版)4