Halliday只是在小句的層面上討論主位和述位的切分，進(jìn)入語(yǔ)篇層次后，這種研究是有局限性的，因此，國(guó)內(nèi)外學(xué)者又進(jìn)一步發(fā)展了這一理論。真正將主位理論運(yùn)用到篇章分析中的是語(yǔ)言學(xué)家Danes。他^[1]認(rèn)為，主位傳遞已知信息，述位傳遞新信息，因此，從信息價(jià)值的角度看，述位的作用更大；但主位在篇章中起到了起承轉(zhuǎn)合的功用，在語(yǔ)篇構(gòu)建中主位的作用大于述位。Danes指出，單獨(dú)一個(gè)句子有一個(gè)確定的主位和述位，因?yàn)闆](méi)有語(yǔ)境，主位和述位都是孤立的，而且沒(méi)有發(fā)展；但語(yǔ)篇是由有意義的連貫句子構(gòu)成的，小句的主位、述位之間會(huì)發(fā)生某種聯(lián)系和變化，并推動(dòng)語(yǔ)篇的有序發(fā)展，這種聯(lián)系和變化被稱(chēng)為主位推進(jìn)（thematic progression）。Danes提出了三種對(duì)語(yǔ)篇分析產(chǎn)生重要影響的模式，即simple linear、TP with a continuous theme和TP with derived themes。我國(guó)學(xué)者徐盛恒^[2]也提出了區(qū)別于Danes的兩種主位推進(jìn)模式：TP with same rheme和crossed pattern。我國(guó)另一位語(yǔ)言學(xué)者黃衍^[3]對(duì)前人的研究做了總結(jié)，提出了七種主位推進(jìn)模式。本研究綜合了Danes、徐盛恒和黃衍提出的推進(jìn)模式，一共七種。

以下是七種主要的主位推進(jìn)模式：

（1）平行型/主位延續(xù)模式（parallel or the same theme pattern）：每句主位和上句的主位相同或相關(guān)，述位不同。

T1 ＝ T2 ＝T3 ...＝ Tn

例如：The brain contains 10 billion nerve cells, making thousands of billions of connections with each other. It is the most powerful data processor we know.

（2）簡(jiǎn)單線性/延續(xù)型/直線延續(xù)模式（simple linear thematic progression）：（前句的述位或述位的一部分是后句的主位，這個(gè)主位又引進(jìn)一個(gè)新的述位，該述位又充當(dāng)下一句的主位）。

R1＝T2 ；R2＝T3；... Rn－1＝Tn

例如：Outside my window is a big lawn. In the middle of the lawn is a flower bed. This bed is full of daffodils.

（3）派生型（derived thematic progression）：前句主位/述位派生或分裂成下幾句的主位。

T2＝part of T1；T3＝part of T1；... Tn＝part of T1

T2＝part of R1；T3＝part of R1；... Tn＝part of R1

例如：

All my families are teachers. My father is a junior middle school teacher; my mother is senior middle school teacher. I work in a college.

Those, who would get a clear idea of the battle of Waterloo, have only to lie down upon the ground in their mind a capital A. The left stroke of the A is the road from Nivelles; the right stroke is the road from Genappe; the cross of the A is the road from Chain to Braine I’Alleud; the top of the A is Mont. St. Jean; Wellington is there.

(Adopted from Advanced English Writing)

（4）交叉型（alternative）/ 交叉延續(xù)模式：前句的主位是后句的述位。

R2＝T1；R3＝T2；... Rn＝（Tn－1）

例如：The play was interesting, but I didn’t enjoy it. A young man and a young woman troubled me. I turned around and looked at them, but they didn’t pay any attention to me.

（5）并列型（coordinate）：在奇數(shù)句中主位相同，偶數(shù)句中另一主位相同。

T2＝T1；T3＝T4 ...

例如：Americans eat with knives and forks; Japanese eat with chopsticks. Americans say “Hi”when they meet; Japanese bow. Many American men open doors for women; Japanese men do not.

（6）集中型/述位延續(xù)模式（concentrated/the same rheme）：前一句的述位是后句的述位。

R1＝R2 ... ＝Rn

例如：England is a country; France is a country; Turkey is a country; Egypt, Italy, Poland are other countries.

（7）無(wú)模式型（no patterning）。

黃衍提出的這一模式中，前句的主位、述位和后句的沒(méi)有關(guān)系。

T1≠T2 ... ≠Tn

例如：I saw the film while watching a television documentary several years ago. The report didn’t concern itself with the concentration camps, but was a filmed history of fighting in the Warsaw ghetto.