UNIT 1 Section Ⅱ Using language-【高考领航】2023-2024学年高中英语必修第二册同步核心辅导与测评（外研版）

Section Ⅱ　Using language 情态动词(1) 观察下面教材中的句子并体会它们的语法特征 (1)I've enjoyed food from both countries ever since I was able to hold a knife and fork—and chopsticks! (2)But there are still some dishes that Dad dare not try even after many years of marriage to my mother. (3)Dad can cook a super “full English breakfast” of bacon, eggs, beans, sausages and toast with butter — Mum and I just have to find a way to get him into the kitchen! (4)Mum says we had better not eat too much roast food as it may make us suffer from heat inside our bodies. (5)“You need not try it if you don't want to，” Mum said. 【语法感悟】 1．句(1)中be able to用于过去时态表示能力时，侧重指经过努力而成功做成了某事。 2．句(2)中dare表示敢，主要用于否定句和疑问句中，没有人称和数的变化。 3．句(3)中have to表示不得不，多强调客观上的需要。 4．句(4)中had better意为最好……，后跟动词原形。 5．句(5)中need为情态动词，往往用于否定句和疑问句。 情态动词表示说话人对某一动作或状态的看法或主观设想，是复合谓语不可或缺的部分。情态动词有一定的词义，但不能单独作谓语，需和实义动词或系动词一起作谓语。情态动词后接动词原形。 1．be able to的用法 be able to表示“经过努力而成功地做成某事”，且有人称和时态的变化，不能与can连用。 ◆After years of hard work, he was able to win the Nobel Prize. 经过多年的艰苦工作，他终于获得了诺贝尔奖。 ◆If we keep trying, we will be able to achieve our goals. 如果我们不断尝试，我们将能实现我们的目标。 [温馨提示] be able to与can/could的区别： (1)be able to 有更多的时态的变化；can 只有一般现在时和一般过去时； (2)was/were able to 表示“过去成功做成了某事”，相当于succeeded in doing sth.；could仅表示客观上有某种能力。 ◆(2022·新高考Ⅰ卷)Everyone can play a part in reducing waste. 每个人都可以在减少浪费的过程中发挥作用。 ◆It took me a long time before I was able to fully appreciate what they had done for me. 我花了很长时间才完全理解他们为我做的事情。 [即时演练1]　选词填空(be able to/could/can) (1)If you have a good sleep, you will be_able_to work out this problem. (2)In today's information age, the loss of data can cause serious problems for a company. (3)When I was young, I could climb any tree in the woods. 2．have to 的用法 have to表示“不得不，必须”，强调客观上的必要性，有人称和时态的变化。否定式为don't/doesn't/didn't have to。 ◆I work not because I have to, but because I want to. 我工作不是因为我必须工作，而是因为我想工作。 [温馨提示] have to与must的区别： (1)have to 强调客观上的必要性；must强调说话者的主观意愿。 ◆We have to finish the work before lunch. 我们必须在午饭前完成这项工作。(强调客观情况迫使，是不得已而为之) ◆W