He was closeted there for hours at a time.With his books held open by a stone,and with a piece of chalk gripped between the knuckles of his trotter,he would move rapidly to and fro,drawing in line after line and uttering little whimpers of excitement.
分析句子成分(主语谓语状语定语什么的……基本每个词都要分析,若有二重复句,从句也请分析)
学好从句之前学好句子的成分很重要。