The paper studied the sentence judgment ability of 138 retarded students.

This paper describes all the expression formats of the judgement sentences in Liudujijing(六度集经).

The judgement sentence which contains "shi" (是) is very characteristic, for it is both of demonstrative and judgement.

It mainly adopted the combination of question-answer sentence with judging sentence and diversified exegetical terminology as well.

"was a judging sentence before Qindynasty.

The results were that the performances of syntactic judgement and revision on different syntactic types were significantly different and showed significant age d.

Using syntactic judgement and syntactic correction tasks,this study explored the processes and features of the development of syntactic awareness in 4～10-year-old Chinese children.

Pointing out the deficiency of the present three leading linguistic analyses, this article admits the existence of reproduced structure of verbs in this special sentence pattern, regards it as a coordinate structure, and proves it by three syntactic judgements.

It is generally believed that declarative sentences in Classical Chinese (CO contained no copula, and that the copula shi(是) developed from a Demonstrative pronominal form (D-pro, for short) in such sentences only after the Warring States period (475- 221 B.

Mediaeval period is critical for declarative sentence, because in this period old declarative sentences withered and new declarative sentences developed rapidly.