Unit 6 When was it invented? 第二课时Section A（3a-4c）学案（含答案）

中小学教育资源及组卷应用平台 Unit6When was it invented?第二课时（3a-4c） 知识要点： 1. by accident偶然地；意外地 相当于by chance 反义词on purpose He made this mistake by accident.他犯这个错误纯属偶然。 2. It is said that a Chinese ruler called Shen Nong was the first to discover tea as a drink. 据说中国的一个统治者神农是第一个发现茶叶可以作为饮料喝的人。 It is said that. . . 句型结构, 相当于People say that. . . , 意为“人们说……”, 属于“It +be +过去分词+that从句”结构, it是形式主语, 真正的主语是that从句。 【归纳拓展】 It +be +过去分词+that从句 (1)It is believed that. . . 人们认为…… (2)It is supposed that. . . 据猜测…… (3)It is reported that. . . 据报道…… (4)It’s known that. . . 众所周知…… It’s known that China has the largest population in the world. 众所周知, 中国是世界上人口最多的国家。 3. remain (1)用作不及物动词, 意为“剩下; 停留; 逗留”，相当于stay。“呆在那里”可以说remain / stay there，但“呆在家里”只能说stay (at) home。 (2)用作连系动词时, 意为“保持; 仍是”, 后接形容词、名词、分词或介词短语作表语。 * She remains in the house all these days. 她这些天一直呆在那栋房子里。 *The room remains cool all summer. 这个房间整个夏天保持凉爽。 *She remained sitting when they came in. 他们进来时, 她仍然坐着。 4. smell n. 气味 可作连系动词（+adj）也可做实义动词“ 闻到, 闻起来” *It gives off nice smell. 它散发出芳香的气味。 *The flowers smell good. 这些花儿闻起来很香。 5. * one of+复数名词 表示“...中的一个” One of the world’s favorite drinks was invented. * one of+the +形容词的最高级.表示“...中最...” The apple is one of the biggest fruits in the bag。 6. in the 19th century “在19世纪”，century (n.) “世纪，百年” 用in the +序数词+century 表“...世纪” in the 1870s “19世纪70年代”，读作the eighteen seventies Eg: I think advertising was highly developed in the twentieth century. 我认为广告业是在20世纪高度发展起来的。 7. take place指“(有计划地)发生, 而happen指“(偶然)发生” Great changes have taken place in our hometown during the past ten years. 在过去的10年里, 我们家乡发生了巨大的变化。 I happened to see him on my way home. 在我回家的路上我偶然看到了他。 popularity (n.) “受欢迎，普及”，短语 the popularity of... “....的普及” 形容词：popular The popularity of the Internet has risen. 英特网的普及程度已经上升了。 9. doubt (n.) “疑惑、疑问” without doubt “毫无疑问，的确” （v.）“怀疑” A sudden doubt came to my mind. 我心中突然起了疑虑。 He doubted Jim, since he was ever dishonest.他怀疑吉姆，因为他曾今不诚实过。 I doubt his word. 我怀疑他的话. 10.at a low price “以低价” at + 具体的价格或price, 表”“以...的价格” I bought this watch at a low price. 我以低价买了这块手表。 11.sudden? n. 突然发生的事 adj. 突然的，意外的；快速的 suddenly adv. “突然” 常位于动词前 all of a sudden “突然，猛地” sudden 是名词，要有冠词 a. 常位于句首或句末。 I felt a sharp pain in my side all of a sudden。我突然感到身体的一边激烈疼痛。 同步练习： 一．选择题 1.She found her keys __when she cleaned room after she lost them two weeks ago. A. with mistak ... ...