Module 5 A Lesson in a Lab（四川课改）：Section Ⅳ Grammar Writing课件（外研版必修1）.pptVIP

本模块的写作任务是写一篇实验报告。实验报告是对某实验的目的、步骤、现象、结论等进行论述的报告。 一般情况下，实验报告是根据实验步骤和顺序展开来 写的。 1．实验目的 即本次实验所需达到的目标或目的是什么，常用the aim of the experiment is to ...来表示。 2．实验用品 写出实验用品，应分类罗列，不能遗漏，常用句型：To carry out/do/perform the experiment, you need the following things: … 3．实验步骤 根据具体的实验目的和原理，写出主要的操作步骤。写作过程中可适当使用表示顺序的词语，使叙述有条理，清楚明了，如first ...，second ...，next ...，and then ..., finally...等。 4．实验结果 如实正确地记录实验现象或数据。 5．实验结论 对于所进行的操作和得到的相关现象运用已知的知识去分析和解释，得出结论。 注意：时态通常采用现在时，而且多使用祈使句，特别是在介绍实验步骤时。 1．描写实验的词汇 实验目的：aim, purpose, in order to 实验过程：method，firstly，secondly，lastly，heat，boil，fill，add ...to, measure, weigh 实验用品：substances, apparatus，equipment，test tube，test tube holder, balance, liquid/solid/gas 实验结果：result，conclusion，rust，in a word，find out，in conclusion [黄金表达] 2．常用句型 ①Below is a description of a simple scientific experiment. ②It aims to show us ... ③To find out if ..., we carried out this experiment. ④Leave the tube for one week. ⑤Boil the water for three minutes. ⑥Put ...at the bottom of the test tube. ⑦Half-fill ...with ... ⑧Put two or three nails in the water. ⑨Add some oil to the water. ⑩This will keep air out of the water. 返回 考点精析 语法讲座 Section Ⅳ Grammar Writing 专题练习 写作讲座 佳作观摩 技法指导 专题练习 Module 5 A Lesson in a Lab 一、英语倍数表达法 1．倍数表达法的三个常用句型 (1)．..times as＋原级＋as ... The concert hall is four times as large as that one. 这个音乐厅是那个的四倍大。 [考题印证1] (2011·陕西高考)The new stadium being built for the next Asian Games will be ______ the present one. A．as three times big as 　　　　 B．three times as big as C．as big as three times D．as big three times as 解析：考查倍数表达法。英语中常见的表达倍数的句型有：①...times＋as＋adj./adv. (原级)＋as ...; ②...times＋adj./adv.(比较级)＋than ...; ③...times＋the length/width/...＋of ...。故B项符合。 答案：B (2)．..times＋比较级＋than ... This line is three times longer than that one. 这条线是那条线的4倍长。 (3)．..times the＋性质名词(size，height，width，depth， length等)＋of ... The new teaching building is three times the size of the ol