新概念英语三册 Lesson13 It’s only me 第（1）套课件下载

Not wanting to frighten the poor man, Mrs. Richards quickly hid herself in the small storeroom under the stairs.
分词短语做状语，表示原因
替换原因状语从句
eg. Tired of a whole afternoon’s listening, he stretched himself and had a deep breath.
efficient adj. (of people) able to work well, capable（指人）高效的, 能胜任的，有能力的
（esp of tools, machines, systems, etc.) exhibiting a high ratio of output to input （尤指工具、机器、系统等）有效力的，功效大的，产出与投入比值高的
eg. an efficient secretary 能干的秘书
an efficient manager 称职的经理
efficient methods 经济而有效的方法        
This new copy machine is more efficient than the old one.
这台新复印机比那台旧的效率高。