Unit 1 Section Ⅱ Using language（课件PPT）-【优化指导】2026-2027学年高中英语必修第二册（外研版2019）

UNIT 1　Food for thought (单元主题语境：人与自我——饮食与健康) Section Ⅱ　Using language 一、基本特征 [感知] 1．(2024·新课标 Ⅰ 卷)Volunteers under the age of 18 must have the parent/guardian approval section signed. 18岁以下的志愿者必须征得家长或监护人的同意并签字确认。 2．(2023·全国乙卷)As time went by，she thought more and more that she could make the London Games—and win. 随着时间的流逝，她越来越相信自己能够参加伦敦奥运会，并且获胜。 3．(2023·全国甲卷)These can't be any good，we thought. 我们认为它们一定不好。 UNIT 1　Food for thought 高中英语　必修　第二册　W 返回导航 [探究] 1．情态动词有一定的词义，后接动词______，不能单独作谓语，须和实义动词或系动词一起作谓语。 2．情态动词一般无_____和数的变化，个别情态动词有现在时和过去时两种时态变化。 3．构成否定句时，not放在其___面。 原形 人称 后 UNIT 1　Food for thought 高中英语　必修　第二册　W 返回导航 二、用法 (一)be able to的用法 [感知] 1．(2023·全国乙卷)Some chapters of this book are able to do just that，but in many cases we simply can't. 这本书的一些章节能够做到，但在许多情况下，我们根本做不到。 2．It is a good idea to learn as much as possible about Chinese culture so that you will be able to handle pressure in this job. 尽可能多地学习中国文化是个好主意，这样你就能应付这一工作的压力。 UNIT 1　Food for thought 高中英语　必修　第二册　W 返回导航 3．The aircraft was able to fly over the endless white plains without difficulty. 飞机可以毫无困难地飞过茫茫无际的白色原野。 4．(2024·全国甲卷)Animals can(＝are able to) express their needs using a lot of ways. 动物可以用很多方式来表达他们的需求。 UNIT 1　Food for thought 高中英语　必修　第二册　W 返回导航 [探究] 1．be able to后跟动词原形，表示具体的能力，与___的用法相近。 2．be able to有更多的_____形式，can只有一般现在时和一般过去时。 3．was/were able to do sth.表示_____成功做成了某事，相当于succeeded in doing sth.。 can/could仅表示客观上有某种能力，不说明实施该能力后的结果。 can 时态 过去 UNIT 1　Food for thought 高中英语　必修　第二册　W 返回导航 be able to与can/could的区别 be able to还可以与某些情态动词连用(通常不与can连用)，be able to有非谓语动词形式而can/could没有。 You might be able to persuade him. 你也许能够说服他。 His voice was carefully controlled，but Harry could sense his excitement. 他的声音是小心控制的，但哈利能感觉到他的激动。 UNIT 1　Food for thought 高中英语　必修　第二册　W 返回导航 (二)dare的用法 [感知] 1．Dare you tell her the truth? 你敢告诉她真相吗？ 2．I daren't ask her this question. 我不敢问她这个问题。 [探究] dare意为“___”，后接动词原形，通常只用于否定句、_____句以及if或whether之后，一般不用于肯定句。 敢 疑问 UNIT 1　Food for thought 高中英语　必修　第二册　W 返回导航 dare也可用作实义动词，意为“敢于”，可以有词形变化，可用于各类句型，其后接不定式(有时也可省略to)。 Does she dare to go alone? 她敢自己去吗？ UNIT 1　Food for thought 高中英语　必修　第二册　W 返回导航 [即练] 单句填空/完成句子 1．Her daughter _____ walk when she was nine months old. 2．The children daren't _________(make) a sound while their parents are sleeping. 3．我低下头，不敢看老师和其他同学的反应。 I lowered my head and _____________________ the reactions of the teacher and other students. 4．能解出这道数学题使他感到自豪。 _____________ work out the maths question made him proud. could (to) make did not dare (to) see Being able to UNIT 1　Food for thought 高中英语　必修　第二册　W 返回导航 (三)have to的用法 [感知] 1．I have to attend an important meeting this afternoon. 今天下午我不得不参加一个重要的会议。 2．(2023·全国乙卷)Gabby Douglas had to leave everything she knew best. Gabby Douglas不得不离开她所熟知的一切。 [探究] have to表示客观上的需要，强调被迫性，有“_______”的含义。have to可用于多种时态，形式随时态变化而变化。 不得不 UNIT 1　Food for thought 高中英语　必修　第二册　W 返回导航 must和have to都表示“必须”，但must侧重说话者的主观看法，认为有必要或者有义务去做某事。 Everyone must keep the law. 人人都要守法。 UNIT 1　Food for thought 高中英语　必修　第二册　W 返回导航 (四)had better的用法 [感知] 1．You had better make more friends through face-to-face communication. 你最好通过面对面的交流交更多的朋友。 2．You had better not miss the last bus. 你最好不要错过末班公共汽车。 [探究] had better意为“______”，用于表示对别人的劝告、建议或表示一种愿望。否定式是把not直接放在had better的后面。 最好 UNIT 1　Food for thought 高中英语　必修　第二册　W 返回导航 (五)need的用法 [感知] 1．If we need pay for it，maybe we have other choices. 如果我们需要付钱，也许我们还有其他选择。 2．You need not tell the entire truth，but you must not lie. 你不必说出全部真相，但你一定不许撒谎。 [探究] need用作情态动词，表示“_____”或“_____”，通常用于否定句、疑问句、条件句。 需要 必需 UNIT 1　Food for thought 高中英语　必修　第二册　W 返回导航 need用作实义动词时，后面可以加to do/doing/to be done。need doing＝need to be done，表示被动。另外，need作实义动词时还可以直接跟名词。 It is a question that needs very careful consideration. 这个问题需要慎重考虑。 The trees need watering. →The trees need to be watered. 这些树需要浇水了。 UNIT 1　Food for thought 高中英语　必修　第二册　W 返回导航 [即练] 单句填空/完成句子 1．Adults need _______(live) their own lives and that's difficult with children. 2．I think these houses need _____________________(repair). 3．如果你不得不在深夜独自走回家，一定要走光线充足的地方。 If you _________________ alone late at night，stick to well-lighted areas. to live to be repaired/repairing have to walk home UNIT 1　Food for thought 高中英语　必修　第二册　W 返回导航 4．我们最好不要一次吃太多，虽然它可能是我们最喜欢的食物。 We ___________________________ at a time though it may be our favorite food. 5．他们还需要准备好用英语接受国际记者的采访。 (2023·新课标Ⅱ卷)They also ________________ to give interviews in English with international journalists. had better not eat too much need to be ready UNIT 1　Food for thought 高中英语　必修　第二册　W 返回导航 用适当的情态动词填空 Miss Fang 1._____ not read for very long with her eyes hurt.Her mother told her that she 2.______ go to the hospital and see a doctor.“You 3.__________ see a doctor as soon as possible，” her mother said. When Miss Fang had free time，she went to the hospital.The clerk said that the doctor 4._____ see her at 3：30. could should had better could UNIT 1　Food for thought 高中英语　必修　第二册　W 返回导航 Miss Fang replied that she would not 5.__________ be there at 3：30，because she 6.______ have an important test then.She asked the clerk if she 7._____ arrange the examination at about ten tomorrow. be able to had to could UNIT 1　Food for thought 高中英语　必修　第二册　W 返回导航 课时梯级训练(二) 谢 谢 $$