Unit 1 Grammar and usage 语法•提升语言能力（课件PPT）-【新课程学案】新教材2023-2024学年高中英语选择性必修第四册（译林版2020）

Grammar and usage—语法·提升语言能力 课时目标 1.阅读介绍中国科学家黄大年的新闻故事，自主探究并复习状语从句的核心规则。 2.通过连词成句的练习，巩固所学，内化新知，然后在关于网络红人的语篇中运用状语从句补全文章信息。 3.正确使用状语从句完成对一位诚实、负责的人物的描述，加深对“诚信和责任”的理解。 语法项目——复习状语从句 初识语法——在美文运用中体悟　   Yo－Yo Ma is a French－born Chinese American cellist known for his musical talent.In 1998, Ma founded Silkroad, an organisation that explores musical traditions in countries so that people can learn about different cultures①. The fundamental purpose of Silkroad is to bring people from across the globe together to play and listen to music.Instruments and styles are blended together to create music that is surprising, rich, and completely original, no matter what culture it comes from②.What's more, as the traditional is mixed with the modern③， people can learn about the development of culture as a whole. The events that Silkroad organises are either performances, workshops, or mixed musical－artistic displays.It is so successful that over 15,000 people each year attend it④.People meet as strangers, but they leave as if they are neighbours⑤ learning that different cultures have more in common than they imagined. 句①是so that引导的目的状语从句； 句②是no matter what引导的让步状语从句； 句③是as引导的原因状语从句； 句④是so ...that引导的结果状语从句； 句⑤是as if引导的方式状语从句。 慧学语法——在归纳演绎中学通　 一、时间状语从句　 1．when, while和as引导的时间状语从句 连词 含义 用法 when 当……时候 可与延续性动词或非延续性动词连用；从句动作可以发生在主句动作之前、之后或与主句动作同时发生 while 当……时候 只可与延续性动词连用；侧重于主句动作与从句动作相对比 as 一边……一 边……；随着 常与延续性动词连用；从句动作与主句动作同时或几乎同时发生 4 2．表示“一……就……”含义的词或短语引导的时间状语从句 (1)有的名词(短语)或副词可引导时间状语从句，如the moment, the minute, the second, the instant, immediately, directly, instantly等；另外，as soon as也可引导时间状语从句，从句中用一般时态代替将来时态。 (2)在hardly/scarcely ...when/before ...和no sooner ...than ...结构中，主句用过去完成时，than, before或when所在的从句用一般过去时；当hardly, scarcely或no sooner位于句首时，主句要用部分倒装。 3．till, until和not ...until/till的用法 until, till两者均表示“直到……为止”，引导时间状语从句。肯定句中，其主句谓语动词必须为延续性动词，表示某动作一直延续到某时间为止；not ...until/till ...表示“直到……才……”，not所在的主句的谓语动词必须为非延续性动词，表示某动作直到某时间才开始。until可放在句首，而till不可放在句首，till一般不用于强调句型。 4．before与since引导的时间状语从句 连词 词义 常用