Context free grammar extended by constrained formula and an improved LR parser are adopted to formalize and recognize the special strings.

The former concerns the lexical meaning,which needs to be comprehended in the system of lexical senses;while the latter implies what its user means by using the word in fact,and needs to be comprehended with a consideration of real context.

It has vital importance for foreign students to master and rightly use the vocabulary meaning of TCSL by context.

The process needs to analyze Chinese text based on the knowledge of linguistic context, it includes zero-anaphoric subject recognizing and zero-anaphoric subject recovering.

The context which refers to the existing environment of the language has three major elements: linguistic context,situational context and cultural context.

Context includes co-text,situational context and cultural context.

This thesis tries to blaze a trail in making a contrastive study of cohesive device,reference,between the Chinese serial novel Hong Lou Meng and its English version A Dream of Red Mansions from the perspective of context of co-text in systemic functional grammar,which is an exercise to integrating context theories with cohesion theories.