In the modern Chinese study, complex sentence used to be a fever and the result has gained great achievements. However, up until now, grammar field hasn't a systematic study on conditional conjunction words. The thesis holds the view that conditional conjunction words can express conditional relation logically and are grammar part which are of linking function.The thesis composed of three parts. The first part distinguishes conditional relation from the point of logic and expression and define the conditional conjunction word. The second part studys on the conjunction word of different level and focus on their grammar location and the characteristic of relalvent part in the sentence. The third part mainly conduct further study on the conditional conjunction words of similar semantic meaning and find out nuance from the perspective of semantic meaning and pragmatics so that the study could be further. |