分词独立结构 （主格分词）
一、形式 名词(逻主) + 分词/分短 二、功能：只能作状语（它只能用于书面语言；主要处于句首或句尾，同样要采用“试探法”）。 1、在句首：不常见（与普通分词作状语雷同） There being a change in the current, the magnetic field(磁场) will change as well. This (has been) done, the function() becomes much simpler. Miniature(微型的) devices(器件) being used, electronic equipment(电子设备) has been made small in size.
请大家看一下这个句子： A new technology(技术) introduced(引入) in the 1960s, laser can pierce(穿透) the hardest(最坚硬的) substance(物质) such as(例如) diamond(金刚石). 2、在句尾 The transistor(晶体管) consists of(由…构成) three parts, emitter(发射极), base(基极) and collector(集电极), the base region(区) being very thin. The purpose(目的) and general(总的) guidelines(指导方针) of each experiment are given, the details(细节) being left(留) to the instructor(教师).
The analysis(分析) of such circuits(电路) requires(需要) the solution(解) of simple “differential equations(微分方程)”— this topic(课题) being part of our study. Now let us determine(确定) the path(道路) of a projectile(抛物体), the resistance(阻力) of the air being neglected(忽略). The application(应用) of electronics(电子学) is now so vast(广的), there being few(没几个) areas(领域) in our everyday lives(日常生活) where electronic devices(电子设备) are not used.
注意：由连系动词“be”变来的分词“being”在独立结 构中可以省去。 This book includes(编入) several applied(应用性) topics(论题), some of them new. There are three balls on the table, one of each color(颜色).