经典句型课件(unit1).pptVIP

Unit 1 Great Scientists ? ? 经典句型讲解 1．杰克每次来城里都会来看望我。 Jack will drop in on me __________ __________he comes to town. 2．我只有找到工作才能有足够的钱继续大学的学业。 _____ ______ _____ _______ ______ ________ ________ ________ _______ _________ ________to continue my studies at college. [答案]　1.every time 2．Only if I get a job can I have enough money 考点1　So many thousands of terrified people died every time there was an outbreak. 每次爆发霍乱时，都有大批惊恐的老百姓病死。 every time 引导一个时间状语从句，相当于whenever，意思是“每当……”。 (1)名词词组作连词用，引导时间状语从句的有：every time，each time，any time，the last time，next time，the first time，the moment，the second，the minute，the hour，the day 等。 (2)有些副词，如directly，instantly，immediately 也可用作连词，引导状语从句。 【典例填充】 1. __________ __________I catch a cold，I have pains in my back.我每次感冒背就痛。 [答案]　Every time 2．She let out a cry __________ __________she saw the snake.她一看到蛇就叫了起来。 [答案]　the moment 3．I left __________the clock struck 5. 钟刚敲了五下我就离开了。 [答案]　immediately 考点2　Only if you put the sun there did the movements of the other planets in the sky make sense. 只有当你把太阳放在中心位置上，天空中其他行星的运动才能说清楚。 only 修饰if 引导的条件状语从句。“only＋状语”放在句首时，句子要用部分倒装结构；only 加主语放在句首时，句子不倒装。 Only in this way can you get to know her. if only表示“要是……该多好”，指一种不能实现或难以实现的愿望。用于虚拟语气，表示过去不能实现的愿望，含有后悔、惋惜之意，谓语动词使用had done形式。表达现在不可实现的愿望，谓语动词用一般过去时；表达将来难以实现的愿望，谓语动词用“would/could等情态动词＋动词原形”或一般过去时。 If only I knew her. If only I had been here last night. If only I would be here tomorrow, but I will have to go to school. 【典例填充】　_________________________________________________________ 只要红灯一亮，就表示有危及职工的险情。 [答案]　Only if the red light comes on is there some danger to employees. 1．__________you talk to someone or write a message，you show your skills to others. A．At times B．Some time C．Every time D．The time [解析]　句意：每次你同别人谈话或写信息时，把你的技巧显露出来。every time “每当……的时候”，引导时间状语从句；其他三项都不能引导时间状语从句，故可排除。 [答案]　C 2．Dont stop__________you meet with a word you dont understand. A．at the time B．each time C．by the time D．sometimes [解析]　根据句子结构可知，选用的短语应起连词作用，引导时间状语从句，故选用each ti