【人教版】选修6 unit4 导学案 3.doc

二 重点短语 come about 发生；造成 How did this dangerous state of affairs come about? 这种危险的事态是怎么发生的? 词组辨析：come about, happen, take place, break out come about “发生，产生”，指要求解释或说明事情发生的理由，常与how连用 happen “发生”，用于词汇，指偶然的，意外的，尤指自发的未能预见的事情发生 take palce “发生”，指事件或事故的发生是在预料之中，并非偶然，常引申为“进行，举行” break out 指战争，火灾，疾病等的突然“发生，爆发” (5) occur 可指偶然发生，也可以指计划发生，occur还表示“突然想到”常用于it occurs to sb that” 完成句子: 1). A fire during the night. 夜间突然发生了火灾 2). That car accident was horrible, but nobody knows how it . 那次车祸真可怕，但是无人知道它是怎样造成的 3). Great changes have in our school in the past few years. 最近几年我们学校发生了很大变化 4). Luckily the earthquake didnt in the center of the city. 幸亏地震没发生在市中心 5). A good idea me. 我想到了一个好主意 关于come的其他短语: come across come into being/existence come into power 开始执政；当权 come into effect/force 开始生效；开始实行 come out come to come up come up with 单项选择： —How did it that you made such a silly mistake? —I myself haven’t figured it out yet. 　 A. bring about B. come about 　 C. come across D. come on 2. quantities of 大量的（接可数名词，又可以修饰不可数名词） Quantities of apples were on the table. Huge quantities of oil were shipped to Japan last year. Its cheaper to buy goods in quantity/ in large quantities. 联想拓展： in quantity/in large quantities 大量的 in small quantities 少量的 易混辨析：a quantity of/quantities of a quantity of 与quantities of，都可译为“大量的”，都既可修饰可数名词又可修饰不可数名词，但用法有区别： a quantity of的谓语动词根据其后的名词而定，跟可数名词复数时谓语动词用 跟不可数名词时谓语动词用 而quantities of 后无论跟可数名词还是不可数名词，谓语动词一律用 填空： 1）A large quantity of air conditioners （have）been sold since the summer came. 2）Every day in hot summer, a large quantity of beer (be) consumed(消费). 3) Quantities of water (be)wasted in our daily lif