前后句子的主位和述位,述位和述位之间发生的某种联系和变化就叫主位推进.主位推进模式：简单线性推进程序、连贯主位类型、派生主位推进程序、分裂述位、跳跃主位程序等类型.（出自黄丽燕《主位推进模式与语篇分析》）

　　以新概念第二册一课为例：

　　LastweekI(T1)wenttothetheatre(R1).I(T1)hadaverygoodseat(R2).Theplay(T2)wasveryinteresting(R3).I(T1)didnotenjoyit(R4).Ayoungman(T3)andayoungwoman(T4)weresittingbehindme(R5).They(T5)weretalkingloudly(R6).I(T1)gotveryangry(R7).I(T1)couldnotheartheactors(R8).I(T1)turnedround(R9).I(T1)lookedatthemanandthewomanangrily(R10).They(T5)didnotpayanyattention(R11).Intheend,I(T1)couldnotbearit(R12).I(T1)turnedroundagain(R13).'I(T1)can'thearaword!(R14)'I(T1)saidangrily(R15).

　　'It's(T6)noneofyourbusiness(R16),'theyoungman(T3)saidrudely(R17).'This(T7)isaprivateconversation(R18)!'.

　　T1:I;

　　T2:Theplay;

　　T3:ayoungman;

　　T4:ayoungwoman;

　　T5(=T3+T4):they(theyoungmanandtheyoungwoman)

　　T6:It;

　　T7:this

　　AccordingtotheThematicProgression:

　　T1→R1/R2/R4/R7/R8/R9/R10/R12/R13/R14/R15

　　T2→R3

　　T3&T4→R5,T3→R17

　　T5(=T3+T4)→R6/R11

　　T6→R16

　　T7→R18