在台灣客家方言中「係」字句使用頻率很高，由它構成的句式豐富多元，具有鮮明的語法特點，有深入探究的價值。在前人研究的基礎上，以傳統語法學理論和方法的前提下，結合三個平面學說，開拓「係」字句的研究視野，深入至「係」字句的句法、語義和語用，筆者從三個平面進
行探究，全面考察、描述和解釋「係」字句，同時透過標記理論的啟發，可以把「係」字句看作有標記項，「係」是標記詞。本文研究主題有六：一、客家方言「係」字與漢語「是」字之音與義分析。 二、「係」字句的類型。三、「係」字句的句法分析。四、「係」字句的語義分析。五、「係」字句的語用分析。六、「係」字結構作焦點標記。筆者透過218句相關「係」字句客家方言的語料，從句法、語義、語用三個平面、焦點標記研究分析後，有幾點心得值得分享:（一） 本文研究認為無論那一種句式中的「係」，它最基本的功用都是肯定的標記，是「判斷動詞」。（二） 以筆者看來，「係」字句可以作為客家方言中一種典型的句式，屬於「句法、
語義、語用」範疇的。（三） 「係……毋係」格式是一種超出單句範圍的焦點強化方式，是客家方言中一種很有特色的焦點強化方式。

In Taiwan, the occurrence frequency of “he” in Hakka dialect is very high. With this word we find various sentence constructions and vivid grammatical features, it is of great value for us to study.We base on the studies of our predecessors and apply traditional grammar theory and
methods as a premise, combining three plane theory, to explore all variety of sentences including “he”. In the same time, enlighten by marked theory, we can explain the "he"-related sentences contains a“he”as its marker. This "he" is marked word.This article has five topics:
First, "he" sentence types. Second, the syntactic analysis on “he”structures. Third, the semantic analysis on he”structures. Fourth, the pragmatic analysis he”structures.. Fifth, “he” as focus marker.
The author works through 218 sentences containing the word "he"from the Hakka dialect corpus. We analyse the syntactic, semantic and pragmatic planes and focus marking, we get some conclusions:(1) This article finds that “he”in all sentences will produces a basic function, which is ,
affirmative marker. It is a "judging verb."(2)To the author, itseems "he" structures can be seen as a typical sentence in Hakka dialects.It contains the "syntactic, semantic and pragmatic" categories.(3)"he ..m-he" form is a way of intensification which is beyond a single sentence scope.It is the Hailuk Hakka dialects feature to emphasize focus.