新概念第二册L7演示教学.pptVIP

New words and expressions Text Key points Grammar The plane was late and detectives were waiting at the airport all morning. They were expecting a valuable parcel of diamonds from South Africa. While two detectives were keeping guard at the door. Be + 现在分词 现在进行时 的过去式 过去进行时 John was watching TV while his wife was talking with a neighbour over the phone. 过去进行时 We were having supper when the lights went out. Lyn was doing her homework carefully when other kids were playing the games . 过去进行时表示过去正在进行的动作或情况，一般过去时则表示比较短暂的动作或事件。 when，while 当……时候（强调动作同时发生） while+从句, 动词一定是延续性动词 when+延续性动词/瞬间动词 While two detectives were keeping guard at the door, two others opened the parcel. 过去进行时往往与表示一段时间的状语连用，如all morning，all night，all day，all evening，the whole week等，表示这段时间一直在干什么。 What were you doing all evening? I couldn’t find you anywhere. Lesson 7 Too late 为时太晚 New Concept English2 New words and expressions Text Key points Grammar ★detective n. 侦探 Detective story 侦探小说 Detective movie/film 侦探片 ★airport n. 机场 ★airfield n. 飞机起落的场地 port 港口 field 田野 at the airport 在机场 on the airfield 在停机坪上 ★expect ①vt. 等待，期待 （心理上的等待） （动作上的等待） They are expecting guests tonight. I expect you to write back. I expect my mother to come back. I wait for my mother. I expect a letter from Jimmy. expect sb.to do sth. 期待某人做某事 wait for sth./sb. 等待 expect sth.期待某事/某物 expect所表示的等待一般暗含着根据某些信息或规律而作出相应反应的意思（心存期待），而wait for主要接续“等待”这个动作本身。 ★expect ★valuable adj. 贵重的 ★precious adj. 珍贵的 value n.v. 价值；valuable adj.有价值的 sth.is valuable precious adj. 珍贵的（带有一定的感情色彩） precious photo 珍贵的照片 -less 表否定 priceless adj. 没有价格的, 无价的 valueless adj. 没有价值, 不足道的 diamond ring 钻石戒指 precious stone 宝石；crystal 水晶；jade 玉 ★diamond n. 钻石 ★steal（stole，stolen） v. 偷 ① vt.vi. 偷盗，行窃 英语中“偷”用steal和rob来表达，宾语是物，用steal；宾语是人，用rob；跟地点相连，也用rob steal sth. 偷(某物) My wallet was stolen. John never steals. 约翰从不偷东西。 rob sb. 抢(某人) I was robbed. rob the bank ② vt. 巧妙地占用，偷偷地弄到手 He h