2011高考英语一轮复习 BookII Unit20教学案 人教大纲版VIP专享

Unit 20理解:要点诠释单词1.dozen讲：n. 十二；(一)打例:Give me a dozen,please. 请给我来一打。 Only about half a dozen turned up. 只有六七个人到了。 He bought three dozen red roses for her on Valentine’s Day.在情人节他给她买了三打红玫瑰。链接·提示 (1)dozen 作“十二”讲，其前有数词或 a,few,several,many 等词修饰时，用单数形式；若后面接代词时，dozen 后 of 不能省略。a,few,several,many 修饰 dozen 其后 of 可有可无。类似单词还有 score,handred,thousand,million。 (2)dozens of 许多；scores of 许多。练:Apples are usually sold by _________ weight,and eggs are sometimes sold by____________ dozen.A.the;the B./;a C./;the D.the;a提示:本题看似考查冠词，实际上考查固定搭配:by weight 意为“按(论)重量；by the dozen 意为“论打”。答案:C2.spare讲：v. 抽出；拔出；留出；匀出；省得；免得；饶恕；赦免；放过adj. 空闲的；多余的；备用的n.备用品例:I’d love to have a rest,but I can’t spare the time just now. 我想休息一下，但眼下找不出时间。 We can only spare one room for you. 我们只能给你腾出一个房间。 He wanted to spare his mother any anxiety. 他不想让母亲有丝毫的担忧。 During the bombing only one house was spared. 在轰炸中，只有一座房子幸免。 I’m afraid I haven’t got any spare cash. 恐怕我手头没有闲钱。 What do you do in your spare time? 你业余时间干什么？ I have lost my key and I haven’t got a spare. 我把钥匙丢了，我还没有备用的。链接·拓展 (1)spare no effort to do sth.不遗余力做某事用心 爱心 专心1 We are determined to spare no effort to beat them in the match.我们决心尽力打败他们。 (2)in one’s spare time 在业余时间 (3)to spare 多余；富余 I’ve got absolutely no money to spare this month. 我这个月一点富余钱都没有。 (4)spare one’s feeling 不惹某人难受；避免触及某人的痛处练:(1)You could have_______________ yourself an unnecessary trip by phoning in advance.A.spared B.separatedC.missed D.freed提示:句意...