It consists of a main clause and one or more subordinate clauses. The subordinate clause is either a noun clause, an adjective clause or an adverb clause.

复合句有一主句，和一句或以上的属从子句。子句可以是名词子句、形容词子句或副词子句。

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It points out that the correct comprehension of open IF-clause depends on the understanding of the semantic relationship between the main clause and the subordinate clause, as well as the context.

文章指出正确理解、把握、使用开放性If -条件句有赖于对主、从句间语义关系的认识以及具体语境的掌握。

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