Unit 1 Lesson 1 Focus On Language—语法·提升语言能力[语法项目— Infinitives］（课件PPT）-【新课程学案】新教材2022-2023学年高中英语必修第一册（北师大版2019）

Lesson 1: Focus On Language—语法·提升语言能力 课时目标 1.辨析句子中的谓语动词与非谓语动词。 2.分析并识别非谓语动词在句子中充当的成分。 3.能正确识别动词不定式在句中的成分并准确使用。 1 语法项目—— Infinitives 初识语法——在美文运用中体悟　 Are you looking for a sports watch① to help you keep track of your fitness and chart your training progress? ②To wear a DX Sports Watch is an ideal choice for you, whether you're a professional athlete or keen sportsperson. It has a digital display③to record your steps, speed and distance, as well as monitoring your heart rate and calories burnt. It also has a voice control setting④to enable you⑤to stay hands-free, while its waterproof band is fully adjustable⑥to wear. DX Sports Watch is only available online, so go to our website and place your order today！ ①动词不定式to help you keep ...作后置定语，修饰a sports watch。 ②动词不定式To wear ...作主语。 ③动词不定式to record your steps ...作后置定语，修饰a digital display。 ④动词不定式to enable ...作后置定语，修饰 a voice control setting。 ⑤动词不定式to stay hands-free作宾语补足语。 ⑥动词不定式 to wear作状语。 慧学语法——运用“形式—意义—使用”三维动态语法观　 动词不定式是非谓语动词的一种，它没有人称和数的变化，动词不定式具有名词、形容词和副词的特征，在句中可以作主语、宾语、表语、定语、状语、宾语补足语等，但不能作谓语。其基本结构：to＋动词原形，有时不定式符号to可以省略。  一、不定式作主语、表语和宾语　 [先感知] ①(教材P8典句)It's so convenient to be able to compare the quality and prices from different online shops before I buy. ②(教材P9典句)My aim is to do well in every subject this term. ③(教材P100典句)All in all, I hope to have a happier, more fruitful and satisfying life in my new school. ④To do this is to cut the foot to fit the shoe. ⑤I think it very necessary to protect the animals. ⑥(教材P9典句)．.. my target is to prepare myself for my degree in biology at university. ⑦(2020·全国卷Ⅱ)Scientists in Louisiana were so concerned that they decided to pay hunters $5 a tail. [会发现] 句是不定式短语作主语； 句是不定式短语作表语； 句是不定式短语作宾语。 [明规则] 1．动词不定式作主语 (1)动词不定式作主语时，在很多情况下都可以用动词-ing 替代，但表示某些具体情况，或表示较强烈的对比，或在某些固定说法中时，通常不用动词-ing替代。 (2)动词不定式作主语，谓语动词用单数形式。 (3)若不定式太长，则往往用it代替不定式作形式主语，不定式移至谓语之后，以使句子结构平衡。 ①④ ②⑥ ③⑤⑦ 2．动词不定式作宾语 (1)有些动词后常跟不定式(而不跟动名词)作宾语，如 decide，afford，agree, attempt, choose, determine, demand, expect，