Abstract: The academe has already noticed the yǒu-construction that means comparison,and has studied the meaning of this construction and the syntactic forms,the semantic properties of each constituent.There are still some problems remained from teaching Chinese as a second language point of view.Actually,1)the meaning of this construction is mainly through the understanding of two parties from a common subject both parties know,which is Subject B,on the description of the degree/extent of Subject A's properties;"有" can be regarded as a verb;"A"and"B"have very complicated syntactic forms,equivalence of the semantics and different saliance;"这么/那么"can indicate the degree of"C",or represent"B",which usually does not occur in affirmative sentence;"C"is primarily an qualitative adjective.