15介词.ppt

介词 prepositions ;【考点示例一】 ◆My father warned me going to the West Coast because it was crowded with tourists. 【2010天津卷】 A. by B. on C. for D. against ◆Tired, Jim was fast asleep with his back a big tree. 【2010四川卷】 A. in B. below C. beside D. against 考点一：against往往可以用来表示“反对、倚靠、违背、映衬”等含义，如be against ...(反对); go against...(违背)；lean against(斜靠)等。;【考点示例二】 ◆Children need friends ____ their own age to play with. 【2009辽宁卷】 A. of B. for C. in D. at ◆These curtains are not the same ____ material so they are ____ different prices. A. of, of B. in, of C. in, in D. of, in ◆Leaves are found on all kinds of trees, but they differ greatly ____ size and shape.【2007 上海卷】 A. on B. from C. by D. in 考点二：在of+adj.+n.的表达中，of表示“属性”；在in+n.的表达中，in表示方面。;【考点示例三】 ◆He invited me to a dance after the show ____ Christmas Eve. 【2009陕西卷】 A. at B. on C. in D. by ◆—When do we need to pay the balance? —____ September 30. A. In B. By C. During D. Within;考点三：表示时间的介词① in表示“在某一时间段”，或“在……某一时候”，如用在月、季、年份、时代、世纪等时间名词的前面: in July / summer / 2000 / ancient times / the 1900s 或用来泛指一天的某一段时间：in the morning / afternoon / evening 也可以指“在……之后”，表示从说话起的若干时间内： The bus will be here in ten minutes.;② on表示“在特定的某一天”，也可用于带有修饰语的一天的某个时间段之前： on Saturday，on National Day, on Saturday morning， on a cold night。 但：at Christmas/Easter ③ at表示具体的时刻：at six o’clock，at half past seven, at noon ④ 介词over可以表示时间的跨度：stay over Christmas.;⑤ 介词for， since表示动作或状态的延续，为“长达……”之意，两者往往用于完成时。I have been there for six years.We have not seen each other since 1993. ⑥ during指“在……时期/时间内”，必须以表示一段时间的词或词组作宾语。She was ill for a week，and during that week she ate little. ⑦ by+某一时刻可以用来表示“到……为止”：I will have finished the job by the time he arrives. ;【考点示例四】 ◆Most Americans would prefer to keep their problems themselves, and solve their problems ____ themselves.【2009湖南卷】 A. to; by B. by; to C. for; to D. in; on ;◆After b