Unit 2 Healthy Lifestyle【核心句式】-2021-2022学年高二英语下册链接教材精准变式练（人教版2019选择性必修第三册）

核心句式 Unit2 （解析版） 2021-2022学年高二英语下册链接教材精准变式练（人教版2019） ( 教材 核心词汇 知识链接 及典例解读 ) 1. “连词+分词” 结构 教材P14 》These bad habits，if left unchecked， could lead to more serious ones when they become adults.如果任其发展，在他们长大成人后，这些不良习惯可能会导致更为严重的有害习惯。 句式剖析 本句的结构分析如下∶ These bad habits, if left unchecked, could lead to more "连词＋分词"结构 serious ones when they become adults. when 引导的时间状语从句 考点提炼 "连词+分词"结构 根据英语表达习惯，if，unless，once，when，while，although，though 等连词引导的时间、条件、方式、让步等状语从句，若其主语与主句主语一致，且从句谓语为系动词 be时，从句的主语和be 动词可省略，这时的"连词＋分词"结构有以下两种常见情况∶连词+现在分词（主语和构成现在分词的动词是逻辑上的主谓关系）连词+过去分词（主语和构成过去分词的动词是逻辑上的动宾关系） If（you are）traveling north，you must change at Moscow.你如果向北旅行，必须在莫斯科换乘。 Experts wan that medical waste from hospitals,if(it is)not handled properly,may lead to the spread of diseases.专家警告说，医院的医疗垃圾如果处理不当，可能会导致疾病的传播。 While(she was)walking along the river,she suddenly saw a beautiful rainbow over the bridge.沿河边散步的时候，她忽然看到桥上方有一道美丽的彩虹。 When(he was)asked the same question again and again,he became increasingly impatient.当再三被问及同一个问题时，他变得越来越不耐烦。 1.语法填空 ①You can have a wonderful view of the city, if_________(stand) on the top of the building. ②When___________(clean)my bedroom, I heard a scream coming from downstairs suddenly. ③Misunderstanding arising from lack of social communication, unless__________(handle)properly, may lead to serious problems. 2.句式升级 When it is seen from a distance, to tell the truth, the scenery appears more beautiful. ___________________, to tell the truth,the scenery appears more beautiful. 【答案解析】1.①standing ②cleaning ③handled 2. When seen from a distance 2. “too......to do...” 结构 教材 P17》But then I always feel too tired to continue!但那时我总是觉得太累了，无法继续下去! 考点提炼 "too…..to do.."结构 该结构在多数情况下表示否定意义，意为"太…而不能做……"。 （1） 该结构中，too为副词，后接形容词或副词，动词不定式 to do 作结果状语。 >When the game finally ended, both of us were lying flat on our backs, too tired to move. 当比赛终于结束时，我们俩都平躺着，太累了，动不了。 （2）动词不定式作结果状语，常用主动形式，其逻辑主语通常是句子的主语;若不是，动词不定式的逻辑主语通常由 for引出。 The book is too difficult for us to read.这本书太难了，我们读不懂。（不定式