苏教版牛津英语选修7 Unit 2.ppt

【拓展延伸】 在as it is结构中，也可用其他形式的代词和be动词，如as they are(were)，as it was等。 【要点拾遗】 If you open up any medicine cupboard or go to any medicine counter in the world, it is likely that you will find aspirin and penicillin. 倘若你打开世界上任何一个药柜或去任何一家药店的柜台，你都很可能找到阿司匹林和青霉素。 【思维激活?试一试】句型转换 ①It’s likely that she will come next month. =She __ _____ __ come next month. ②Because he works so hard, there is a high probability that he will pass the language exam. =Because he works so hard, ___ _____ ____ he will pass the language exam. is likely to it’s likely that 【知识构建?记一记】 本句中it is likely that. . . 为固定句型，意为“很可能做某事”。可以转换为：sb. /sth. be likely to do sth. ，此句型与there is a high probability that. . . 同义。 ③I haven’t seen her for a long time, and she is likely to have gone abroad. 我很久没有见过她了，她可能已经出国了。 【明晰异同?辨一辨】 likely 指从外表、迹象上判断有可能发生。既可用人也可用物作主语, 常用句型是it is likely that. . . 或sb. /sth. be likely to do. . . possible 指客观上有可能, 但往往含有希望很小的意味。一般不以人作主语, 常用句型有: it is possible(for sb. )to do sth. 或it is possible that. . . probable 可能性比possible大, 表示“很可能, 十有八九”, 不能以人作主语, 通常用于it is probable that. . . 【巧学助记?看一看】 不同大小的可能 【即学即练】 单项填空 1. (2015·安庆模拟)He is ready to help others, seldom, ________ , refusing them when they turn to him. A. if never B. if ever C. if not D. if any 【解析】选B。句意: 他乐于助人, 别人向他求助时他几乎从不拒绝。if ever意为“曾有的话”, 是if there is ever的省略。 2. (2015·南京模拟)Steve was busy clearing the cups and dishes from the table ________ others were playing. A. until B. if C. since D. while 【解析】选D。句意: Steve在忙于清理桌子上的茶杯和碟子而其他人在玩。根据句意可知, 空处前后表达的是两个同时发生的动作, 强调对比, 表示“而”, 所以用while。 3. ________ good looks are impressive, they hardly make someone a lasting star. A. Once B. Unless C. Since D. While 【解析】选D。句意: 虽然好的外貌令人印象深刻, 但是它们也不能让一个明星长久出名。根据句意可知, 这里while引导让步状语从句, 意为“虽然, 尽管”。 4. (2015·连云港模拟)Do you think that bridge ________ 2, 000 meters long? It doesn’t appear ________ long. A. measures; that B. is measured; so C. is measured;