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1、2019-2020学年新教材高中英语Unit1FoodforthoughtPeriodUsinglanguageGrammar&Vocabulary教学案外研版必修第二册Period Using languageGrammar & Vocabulary Grammar(情态动词一)课前自主预习观察句子，总结规律 . I was_able_to hold a knife and forkand chopsticks!But there are still some dishes that Dad dare not try even after many years of marriage to
2、my mother.Mum and I just have_to find a way to get him into the kitchen!. wed_better not eat too much roast food as it may make us suffer from heat inside our bodies, . You neednt try it if you dont want to, Mum said, . 我的发现以上五个句子都使用了情态动词。(1)句中的be able to意为“_”。(2)句中的dare意为“_”。(3)句中的have to意为“_”。(4)句
3、中的d better为_的缩写，意为“_”。(5)句中的need意为“_”。答案：(1)能够(2)胆敢，敢于(3)不得不(4)had better；最好(5)需要精讲课时语法一、be able to的用法be able to意为“能够，有能力”，不仅有时态、人称和数的变化，而且还可以与某些系动词或情态动词连用(通常不与 can 连用)，甚至还可以有非谓语形式。He hasnt_been_able_to get in touch with her.他一直未能和她联系上。You might_be_able_to persuade him.你也许能够说服他。I hope to_be_able_to
4、do the work.我希望能干得了这项工作。I regret not_being_able_to help her.我很遗憾未能帮助她。易混辨析can和be able to都可以表示能力，前者泛指一般的能力，只有两种形式，即can, could；后者表示通过努力可以具备具体做到某件事的能力或实现某种状态，重点强调的是要有一个努力的过程。如：I can drive a car.(我会开车)I will_be_able_to drive the car in a week.(隐含着我努力一周后就有能力学会开车的意思)二、dare的用法dare既可作情态动词，也可作实义动词。1dare作情态动词
5、时，表示“敢，敢于”，后跟动词原形，常用于疑问句、否定句和条件句中。此时的dare没有人称、数和时态的变化，能单独构成否定和疑问。例如：Dare you climb that tree?你敢爬那棵树吗？He darent go there because it is very dangerous.他不敢去那儿，因为那儿很危险。2dare用作实义动词时，有时态和人称的变化，用do, does或did来构成否定句或疑问句。She didnt dare to say a word, did she?她一句话也没敢说，是吗？三、have to的用法have to意为“不得不”，有时态、人称和数的变化，
6、其否定形式为dont/doesnt/didnt have to。Its too late. I have_to go home now.天色太晚了，我现在得回家了。You dont_have_to finish the work now.你现在没有必要完成这项工作。易混辨析have to和must的区别have to表示一种客观的需要，而must表示一种主观的需要。此外，must还表示“偏要”“非得”的意思。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。I must clean the room b
7、ecause its dirty.我必须打扫一下房间，因为太脏了。四、had better的用法had better意为“最好”，后跟动词原形，常用来提出建议，或表示迫切地希望、警告等，语气较强。其中动词had没有人称或数的变化。had better的简略式为d better，否定式为had better not。Shed_better get here soon or shell miss the opening ceremony.她最好快点到这儿来，否则她会错过开幕式的。They had_better_not be late.他们最好不要迟到。五、need的用法1作情态动词(1)need作
8、情态动词时，常用于疑问句、否定句或表示疑问的从句中，意为“需要”。Need I finish the work today?Yes, you must./No, you neednt.我需要今天干完这活吗？是的，必须干完。/不用，你不必干完。(2)neednt 意为“不必”，表示客观上不必如何。So I neednt pretend, need I?因此我不必假装，对吧？2作实义动词need作实义动词时，后可接名词、动名词、不定式等，有人称、时态和数的变化。The bike needs_repairing.The bike needs_to_be_repaired.这辆自行车需要修理。选词并用
9、适当形式填空： be able to; dare; have to; had better; need1She _ not go out alone at night.答案：dare2Its quite warm here so we _ not turn the heating on.答案：need3You _ arrive early so that you will not miss anything. 答案：had better4He _ walk home yesterday because his car broke down.答案：had to5Neither my wife n
10、or I _ persuade my daughter to change her mind now.答案：am able to6He _ play the piano when he was 5 years old.答案：was able to Vocabulary1related adj. 有关系的，相关的(P5)归纳拓展(1)be related tobe connected with 与有关系/关联(2)relate v. 联系，使有联系relate to 涉及；与相关relate . to . 把和联系起来Light industry is closely related_to ag
11、riculture.轻工业和农业密切相关。The questionnaire relates_to our lifestyle.这份问卷调查和我们的生活方式有关。It is difficult to relate these results to any known cause.很难把这些结果和任何已知的原因联系起来。(1)单句语法填空This is an French word _ (relate) to music.We must relate what he says _ what he does.答案：relatedto(2)单句写作未来，工资的增加将和绩效相关。In the futu
12、re, pay increases will _ productivity.他问了一些和他的专业有关的问题。He asked some questions _ his major.答案：be related torelated to2diet n. 日常饮食vi. 节食；按规定饮食(P5)归纳拓展keep a balanced diet 保持均衡的饮食be on a diet 节食(表状态)go on a diet 节食(表动作)Everyone should keep_a_balanced_diet for the benefit of health. 为了健康，每个人都应该保持平衡的膳食。
13、Have you been_on_a_diet? Youve lost a lot of weight.你最近在节食吗？你瘦了好多。Ive been dieting ever since the birth of my second child.我生完第二个孩子后就一直在节食。单句写作My sister wants to _ (节食), because she thinks she is overweight._ (均衡的饮食) is important for a childs development. Drinking water is a key part of _ (健康的饮食) an
14、d it makes your skin clearer and takes weight off. 答案：go on a dietA balanced dieta healthy diet3addict n. 对着迷的人vt. 使上瘾(P5)归纳拓展(1)addict oneself to 沉溺于；醉心于(2)addicted adj. 上瘾的；沉迷于某种嗜好的be/become/get addicted to . 沉迷于；热爱(3)addictive adj. 使人上瘾的addiction n. 瘾，入迷，嗜好After his divorce, Bruce addicted_himself_to drinking, thus losing his job.离婚后，布鲁斯终日醉酒，结果丢了工作。Teenagers who are_addicted_to the Internet are more likely to suffer from depression.有网瘾的青少年更可能患忧郁症。You should stop taking this medicine becau
