求句型分析和讲解!The task of writing a dictionary begins...

题目

求句型分析和讲解!The task of writing a dictionary begins...
The task of writing a dictionary begins with reading huge amounts of the literature of the period or subject that the dictionary is to cover.
① to 涉及的意思么?为什么是 to cover而不是covering?
②求断句语法分析.
③ that the dictionary is to cover.that在这边什么作用?引导一个句子么?

答案

1,to cover 是“涵盖；涉及”的意思.因为dictionary只是准备编写,是将来发生的动作,cover的动作还没有发生,所以用不定式to cover；2,这是个“主语--谓语---宾语”结构的句子.骨干是：The task begins with XXX.主语...