请教下句子结构The main function of the language-laboratory is to take over those aspects of the drill-work which are repetitive,mechanical,and do not absolutely require the presence of a live speaker,thus sparing the time and energy of this la

请教下句子结构The main function of the language-laboratory is to take over those aspects of the drill-work which are repetitive,mechanical,and do not absolutely require the presence of a live speaker,thus sparing the time and energy of this la
请教下句子结构
The main function of the language-laboratory is to take over those aspects of the drill-work which are repetitive,mechanical,and do not absolutely require the presence of a live speaker,thus sparing the time and energy of this latter for more essential work.请帮忙分析下句子结构,重要的是其中的do not absolutely require the presence of a live speaker它的主语部分是什么?
我已经弄清了。句子应该这样划分（The main function of the language-laboratory是主语）（ is 谓语）（to take over those aspects of the drill-work表语）（ which are repetitive,mechanical定语从句修饰drill-work）,and（ do not和前面的is并列也是谓语） （absolutely require the presence of a live speaker是do not的宾语）,（thus sparing the time and energy of this latter for more essential work是结果状语从句）。希望大家分享知识！

请教下句子结构The main function of the language-laboratory is to take over those aspects of the drill-work which are repetitive,mechanical,and do not absolutely require the presence of a live speaker,thus sparing the time and energy of this la
从意思上看 主语是the language-laboratory
但是显然句子语法错了 因为根本找不到这个主语
louzhu你这样主语和谓语搭配没问题吗 主语是function啊

do not absolutely require the presence of a live speaker的主语自然是引导定语从句的引导词which, which引导定语从句，指代先行词aspects,同时它又在定语从句中做are repetitive, mechanical以及do not absolutely require ...的主语。