班级量化考核.pptx

重庆大学版 高二(6) Unit 1;Language points;1. The coqui frog population has been increasing in Hawaii since 1988, but just recently exploded.;1. He left the village in 1982 and I haven’t seen him since then. 1982年他离开这个村子，从那以后我再没见过他。 2. She’s been working in a bank since leaving school. 她中学毕业后就一直在一家银行工作。 3. He had spoken to her only once since the party. 自从那次聚会以来，他只跟她说过一次话。;二．since作为副词，表示从过去以来、以后或到现在的情形或状态，常与现在完成时态连用。 1. He left home two weeks ago and we haven’t heard from him since. 他两周前离开了家，到现在我们一直没有他的消息。 2. He came to Zhenjiang 6 years ago and has lived here (ever) since. 他6年前来到镇江，从此便住在这里。;三．since引导时间状语从句 1. 若since引导的状语从句的谓语是终止性 动词的过去时，则从句表示的时间是“从动作开始的那一时刻起”。例如：;We have been missing them since they left here. 自从他们离开这里，我们就一直很想念他们。;2. 若since引导的状语从句的谓语动词是持续性动词或表示状态动词的过去时态，则从句表示的时间是“从句动作或状态结束时算起”。例如： I haven’t heard any noise since I slept. sleep 为持续性动词，sleep的动作结束时，即“醒来”时，所以这句应译为“我醒后还未听到任何声音”。;3. 若since引导的状语从句的谓语为持续性动词的现在完成时，则表示动作和状态延续到现在（说话时刻），其表示的时间的起点应从动作发生之时算起。例如： I haven’t heard from him since he has lived there。 这里has lived表示动作的持续性，时间的起点应从：“开始居住”时算起。因此此句可理解为“自从他（开始）住在那儿起，我就一直没收到他的来信”。;四．since在特殊句型中的应用 句型I：“It is （has been）+ 时间 + since +持续性动词的过去时”，表示“自从……以来到现在已有多久。” ;句型II：“It was + 时间 + since + 持续性动词的过去完成时”, 表示“从……到过去某时间点以来”。 It was three years since we had been here. 那时我们在这已呆了三年。;(05 京春) It is almost five years __ we saw each other last time. A. Before B. since C. after D. when;考题：--Has he been home? --___, he ____ home since he graduated. A. No; hasn’t been??? B. Yes; has been?? C. No; isn’t???? D. Yes; is?? ;population用法：;二、当主语是表示“人口的百分之几、 几分之几”时, 谓语动词用复数形式。 About seventy percent of the population in China are farmers. 中国大约有百分之七十的人口是农民。;三、有时population可用作可数名词, 其前 可用不定冠词。 China has a population of about 1.3 billion. (=There is a population of about 1.3 billion in China.) 中国大约有十三亿人口。 New York is a big city with a population of over 10 million. 纽约是一个有一千多万人口的大城市。;population用法：;五、询问某国、某地有多少人口时, 不用 “How muc