Unit 4 Helping people around the worldr课件7（牛津高中选修6）.ppt

易混辨异 if only,only if (1)if only表示“但愿……；要是……就好了”,常引 导表示虚拟语气的条件句或感叹句。 (2)only if表示“只要、只有”,only是副词,修饰整 个if从句。用于句首时,后面的主句主谓倒装。 My grandfather wakes up only if the alarm clock rings. 只有闹钟响了我爷爷才会醒。 Only if a teacher has given permission is a student allowed to leave school. 学生只有得到老师的许可才能离开学校。 即学活练 (4)Look at the trouble I am in! If only I your advice. A.followed B.would follow C.had followed D.should follow C 11.refer to 提到;谈到;意指;与……有关;查阅, 参考 挑战自我 (1)刚才在会上提到的那个人是这个领域的专家。 The person was an expert in this field.  (2)那位驻美国的中国大使谈到了他过去在云南的 经历。 The Chinese ambassador to America in Yunnan.  referred to at the conference referred to his past experiences (3)我知道那位太太在说到聪明男孩时指的是杰克。 I knew the lady Jack when she spoke of a bright boy.  (4)如果你不明白这个意思,请查字典。 If you don’t know what this means, . was referring to refer to the dictionary 帮你归纳 refer to...as...把……称作是/看作是…… The scientists refer to the discovery as the most exciting new development in this field. 科学家们把这个发现看作是这个领域的最激动人心 的新进展。 reference n.提到；涉及；参考；查询 with/in reference to关于 reference books参考书 即学活练 (5)The president spoke at the business meeting for nearly an hour without his notes. A.bringing up B.referring to C.looking for D.trying on  B 12.break down 出故障,抛锚;分解 挑战自我 (1)在回家的路上汽车抛锚了。 The car . (2)如果你这样继续工作下去,你的身体迟早会 　　　垮掉。 If you go on working like this,you’ll . broke down on the way home break down sooner or later 帮你归纳 break away from从……中脱离 break in闯入;打断 break into闯入(后接宾语) break out (火灾、战争等)突然发生,爆发 break through突破(障碍,包围等) break up分开；驱散；解散；结束,终止 break off断开；突然终止 即学活练 (3)The criminal from the two policemen who were holding him and ran away. A.broke off B.broke away C.broke up D.broke down B 品味构词 1.利用派生法，品句选词 —Have you read the English novel,P