There is an obvious tendency in the internal order of Chinese subordinate complex sentences, that is the hierarchy order of hypothetical clause > conditional / concessive clause > causal clause >purpose clause. In this sequence, the more on the left, the bigger the preposing inclination of subordinate clause is, the more on the right, the bigger the postposing inclination of subordinate clauses is. Overall,the dominant order of hypothetical, conditional, concessive and causal clauses is preposition, and the dominant order of purpose clause is postposition. The above hierarchical order and the level differences among different subordinate complex sentences could be explained from the semantic point of view .
