受益了，學習了。有一點敢問前輩一下：

為什麽不把這個從句當作主語從句來分析，把IT 當作來代替這個主語從句的：that a single man in possession of a good fortune must be in want of a wife.？

可不可以理解成：That a single man in possession of a good fortune must be in want of a wife is a truth universally acknowledged。？

而如果能把這個從句當作主語從句來分析，主從句之間的逗號作用就顯得大了。