外研版高中英语选择性必修第四册精品课件 Unit 3 Section B

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The professor warned the students that on no account __s_h_o_u_l_d__ ___t_h_e_y____ __u_s_e___ _____m_o_b_i_l_e__ ___p_h_o_n_e_s____in his class.(写作话题之学校生活)
考虑……
【背佳句】He gave a detailed account of what happened on the fateful night. 他详细叙述了那个灾难性的夜晚所发生的事情。 【名师点睛】 位于句首倒装,“决不”短语大荟萃:by no means,in no way,in no case,on no condition,under no circumstances,at no time等。
以和 no matter what 互换。
⑤if引导 条件状语
从句。
⑦s导 地点状语
从句。
语法精讲
一、状语从句概述
定义 位置
状语从句用作状语,是起副词作用的句子 状语从句可以放在主句之前,也可以放在主句之后,时间、条件、 原因和让步状语从句放在句首时需要用逗号和主句隔开
Section B Using language
Unit 3
英语
内容索引
基础落实•必备知识全过关 重难探究•能力素养全提升 语法冲关•语言规则全理清
基础落实•必备知识全过关
Ⅰ.重点单词
1. scholar n.学者 2. department n. (大学的)系,部 3.institute n. 学院;研究院
While watching TV,children do not merely absorb words and images. 孩子们看电视时,不仅仅是吸收文字和图像。
【名师点睛】 when作并列连词,意为“这时”,相当于and at this/that time,用于以下句式:
be about to do...when... be doing...when... be on the point of doing...when... had done...when...
adj. 专家的,内行的
②The opinion that learning is a lifelong process has been expressed by
education experts throughout the years. n. 专家
③She has always excelled in
练出神 用account短语填空 ①Some animals are in danger of dying out on account of lack of habitat.I am dying to be a volunteer to save these friends of ours. ② Take into account your strengths and weaknesses and choose the job suitable for you. ③Several reasons may account for my preference for western painting.
is too late. 空气污染正变得越来越严重,所以我们必须采取行动,以免为时过晚。
It will be two years before they graduate from senior high school. 他们要过两年才能高中毕业。 It won’t be long before we know the result of the experiment. 我们很快就会知道实验结果。 (3)since引导时间状语从句 since引导的时间状语从句中,从句谓语动词用一般过去时,主句的谓语动词 用现在完成时。
2.be an expert in熟于,精通;是……方面的专家 【教材原句】Qian was an expert in both Chinese and Western languages
and culture. 钱钟书是中西语言和文化的专家。 【归纳拓展】 expert n. 专家,行家,能手 adj.熟练的;内行的;老练的 an expert in/at/on+n./doing在/做……方面是行家,(做)……熟练 expert knowledge专门知识 【背佳句】He is an expert in studying the acquisition of a second language. 他是研究第二语言习得的专家。
根据其作用可以分为时间、地点、原因、条件、目的、让步、方 分类
式和比较等状语从句
作用 它可以修饰谓语、非谓语动词、定语、状语和整个句子
二、状语从句详解 1.时间状语从句 (1)when,while和as引导时间状语从句
when while as
从句谓语动词为延续性或非延续性动词,主从句动作可以同时发生, 也可以先后发生 从句谓语动词为延续性动词或表示状态的词,强调主从句动作同时 发生。其后多用进行和表示状态的词 从句谓语动词一般为延续性动词。主从句动作同时发生或交替进 行,意为“一边……,一边……;随着”
正要做……,这时…… 正在做……,这时…… 正要做……,这时…… 刚做完……,这时……
(2)before引导时间状语从句 before表示“在……之前;还未……就……;趁着”,常用于以下句型中: It will be long before...得过好久才…… It will not be long before...过不了多久就…… It was long before...过了好久才…… It was not long before...过了不久就…… Air pollution is getting more and more serious,so we must take action before it
7.get information on 了解……的信息
8.fondness for
喜欢……
重难探究•能力素养全提升
重点词汇
1.give an account of叙述,说明 【教材原句】Zhang Qian,a diplomat,gave a reliable account of the lands of Cental Asia for the Han court. 外交官张骞为汉朝提供了中亚各地的可靠记载。
As he grew older,he became less active. 随着年龄的增长,他变得不那么活跃了。 Shaking hands is the most popular way to greet each other when people meet. 握手是人们见面时最常用的打招呼方式。
I was so anxious that⑦ I went to bed dreaming about what I would find at the top of this magical mountain.Could there be a castle up there?Maybe I would find a monster where⑧ there are green woods.Maybe I was taking the risk of never coming back home.Or,maybe all I would find was absolutely nothing!However,whatever⑨ I would encounter,I was going to climb that mountain at all cost.And it was not a long time before⑩ I tried this adventure again.
【名师点睛】 “精通,擅长”集锦 be proficient in精通 be well up in 精通/熟悉…… excel in/at在……方面擅长 be skilled in精通……
练出神 一词多义/单句填空
①The centre provides expert advice for people with financial problems.
foreign languages.
写精彩 完成句子·背诵 ④你不需要事事精通,但是必须每件事都做好,必须学会灵活多变,知道什 么时候寻求帮助。 You have to be good but not ___a_n_ __e_x_p_e_r_t_ ____i_n__ __e_v_e_ry_t_h_in_g_____that you do,and you have to know when to be flexible and when to ask for help.
I climbed and climbed,though④ there was nothing but just green bushes and these steps.I had to reach the top!However,it was now getting really dark.My mum would be worried sick if⑤ I didn’t come home soon.Tired and scared as⑥ I was,I ran back home almost in the dark.
【归纳拓展】
account n. 解释;描述;账户;账目;理由 v. 把……视作,认为 account for解释;是……的原因;占……(比例) on account of由于;因为 on no account决不(置于句首时,句子用部分倒装)
take...into account/consideration take account of
语法冲关•语言规则全理清
情景导入
复习状语从句
阅读下面短文,注意文中黑体词的句法功能。 When① I was a little girl,my family moved to a tiny town at the bottom of a
big mountain.One day after school,while② I was exploring the green woods of this magnificent mountain,I almost fell on a set of stairs.What could these steps lead to?Curiosity got the best of me even though③ I knew it would be starting to get dark soon.I started climbing up those strangely mysterious steps.
【语法感悟】
①②⑩when,while和before引导 时间状语 从句。其中while引导时间状
语从句时,其后常用 进行时 和表示状态的词。
③④⑥⑨ even though,though和as以及whatever引导让步状语从句。as引导
让步状语从句时,句子要用 倒装 语序。whatever引导让步状语从句可
Ⅱ.重点短语
1. give an account of
叙述,说明
2. show an interest in
表现出对……的兴趣
3. be accepted into
被……录取
4. in addition to
除……之外
5. work as
担任……工作,当……
6. be an expert in
熟于,精通;是……方面的专家
写精彩 词汇升级/完成句子·背诵 ④The other day,due to his working hard he was recommended to participate in a contest about biology. →The other day, on account of his working hard he was recommended to participate in a contest about biology. ⑤教授警告学生们绝对不要在他的课堂上使用手机。
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