承前-启后
pakkhavākya - pakkhantaravākya

E.g. 例如：

A. He has two sons, John and Bob.
他有两个儿子，乔恩和鲍勃。
B. John is a student at Harvard. He is studying science, etc, etc.
乔恩是哈佛大学的一名学生。他学的是理科，等等，等等。
C. Bob (T.M) is a soldier. He is fighting in Iraq, etc, etc.
鲍勃(T. M)是一名士兵。他在伊拉克作战，等等，等等。

(T.M) = " the next topic is" (T. M)=“然后” The following unit C is a Unit of Next Theme with reference to B, for it carries a different theme in contrast with that given in B. 下面的单元C是关于B的下一个主题（启后）的单元，因为它带有与B中给定的不同的主题。

Accordingly, B is termed a Unit of Previous Theme with reference to A. 因此，B被称为关于A的前一个（承前）主题的单元。

Special Types of the Pair “Previous Theme / Next Theme”

Unit of Question followed by Unit of Answer提问-回答
Unit of Critical Question followed by Unit of Rejoinder 质问-辩护
Unit of Critic’s Premise followed by Unit of Critic’s Conclusion 质问的条件-质问的结论
Unit of Exponent’s Premise followed by Unit of Exponent’s Conclusion 辩护的条件-辩护的结论
Unit of Indefinite Content followed by Unit of Definite Content 不定指-特指
Unit of Standard of Comparison followed by Unit of Compared Object 参照物-比较物
Unit of Quoted Speech followed by Unit of Quotation Possessor 引文-出处

Note 注：

Each pair above except the first two can have its members reversed in position.
除前两对外，以上每一对都可以将其组分颠倒位置。